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influences created astronomical observatories and developed ideas on the nature of the Universe, along with calendars and astronomical instruments. A key...

The astronomical unit (symbol: au or AU) is a unit of length defined as 149597870700 m. Historically, the astronomical unit was conceived as the average...

An astronomical object, celestial object, stellar object or heavenly object is a naturally occurring physical entity, association, or structure that exists...

An astronomical clock, horologium, or orloj is a clock with special mechanisms and dials to display astronomical information, such as the relative positions...

Engineering on an astronomical scale, or astronomical engineering, i.e., engineering involving operations with whole astronomical objects (planets, stars...

The Prague astronomical clock, or Prague Orloj (Czech: Pražský orloj [praʃskiː orloj]), is a medieval astronomical clock attached to the Old Town Hall...

The International Astronomical Union (IAU; French: Union astronomique internationale, UAI) is an international non-governmental organization (INGO) with...

The Astronomical League is an umbrella organization of amateur astronomy societies. Currently their membership consists of over 330 organizations across...

question marks, boxes, or other symbols. Astronomical symbols are abstract pictorial symbols used to represent astronomical objects, theoretical constructs and...

The Astronomical Society of the Pacific (ASP) is an American scientific and educational organization, founded in San Francisco on February 7, 1889, immediately...

An astronomical survey is a general map or image of a region of the sky (or of the whole sky) that lacks a specific observational target. Alternatively...

position. Astronomical twilight is defined as when the geometric center of the Sun is between 18° and 12° below the horizon. During astronomical twilight...

This is a list of lists, grouped by type of astronomical object. List of Solar System objects List of gravitationally rounded objects of the Solar System...

The American Astronomical Society (AAS, sometimes spoken as "double-A-S"[citation needed]) is an American society of professional astronomers and other...

A list of future observable astronomical events, of the classical variety: those seen by eyesight, or happen within the Solar System. These are by no means...

calendar), as well as periods loosely associated with the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year,...

An astronomical complex or commemorative astronomical complex is a series of man-made structures with an astronomical purpose. It has been used when referring...

Astronomical nutation is a phenomenon which causes the orientation of the axis of rotation of a spinning astronomical object to vary over time. It is...

contemporary astronomy, 88 constellations are recognized by the International Astronomical Union (IAU). Each constellation is a region of the sky bordered by arcs...

This technique is the basis for astronomical interferometer arrays, which can make measurements of very small astronomical objects if the telescopes are...

The Hong Kong Astronomical Society (HKAS) is the first public Hong Kong astronomical body, for amateur astronomers and other interested individuals. The...

between stars) or Stonehenge (which has some alignments on astronomical phenomena). Astronomical observatories may be private or they may be public. Ground-based...

An astronomical day refers to a length of day of exactly or nearly 24 hours beginning at noon instead of at midnight. The exact length has been variously...

This article lists the most distant astronomical objects discovered and verified so far, and the time periods in which they were so classified. An alternative...

February. From an astronomical view, the equinoxes and solstices would be the middle of the respective seasons, but sometimes astronomical summer is defined...

The Royal Astronomical Society (RAS) is a learned society and charity that encourages and promotes the study of astronomy, solar-system science, geophysics...

spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9460730472580.8 km, which is approximately...

not an astronomical full moon, but the 14th day of a lunar month. Another difference is that the astronomical equinox is a natural astronomical phenomenon...

An astronomical instrument is a device for observing, measuring or recording astronomical data. They are used in the scientific field of astronomy, a natural...

In astronomy, a transit (or astronomical transit) is the passage of a celestial body directly between a larger body and the observer. As viewed from a...

Dusk occurs at the darkest stage of twilight, or at the very end of astronomical twilight after sunset and just before nightfall. At predusk, during early...

large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (au), i.e., 30...

International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects...

Earth–Moon system’s orbital motion and the Earth's rotation. While these astronomical forcings generate the fundamental tidal potential, actual observed tides...

CE (Common Era) and BCE (Before the Common Era) instead of AD and BC. Astronomical year numbering and ISO 8601 do not use words or abbreviations related...

The Strasbourg astronomical clock is located in the Cathédrale Notre-Dame of Strasbourg, Alsace, France. It is the third clock on that spot and dates from...

An astronomical catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin...

An astronomical filter is a telescope accessory consisting of an optical filter used by amateur astronomers to improve the details and contrast of celestial...

Astronomical chronology, or astronomical dating, is a technical method of dating events or artifacts that are associated with astronomical phenomena. Written...

The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American...

Hampton Court astronomical clock is a sixteenth-century astronomical clock in Hampton Court Palace in England. The clock was installed in 1540 on the gatehouse...

English translation: Strasbourg Astronomical Data Centre) is a data centre which collects and distributes astronomical information. It was established...

distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within...

began traveling to the Southern Hemisphere. In 1922, the International Astronomical Union (IAU) formally accepted the modern list of 88 constellations, and...

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal in astronomy, astrophysics and related fields. It publishes...

Astronomical time is a time based on cyclic astronomical events. Simple examples are the recurring cycle of day and night, a consequence of Earth's rotation...

The astronomical system of units, formerly called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy...

An astronomical catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin...

An astronomical radio source is an object in outer space that emits strong radio waves. Radio emission comes from a wide variety of sources. Such objects...

This is a partial list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location...

The Astronomical Almanac is an almanac published by the United Kingdom Hydrographic Office; it also includes data supplied by many scientists from around...

The National Astronomical Observatory of Japan (国立天文台, kokuritsu tenmondai) (NAOJ) is an astronomical research organisation comprising several facilities...

Babylonian astronomical diaries are a collection of Babylonian cuneiform texts written in Akkadian language that contain systematic records of astronomical observations...

 'star-gazing tower') is an astronomical observatory in Gyeongju, South Korea. Cheomseongdae is the oldest surviving astronomical observatory in Asia, and...

The Orbiting Astronomical Observatory (OAO) satellites were a series of four American space observatories launched by NASA between 1966 and 1972, managed...

An astronomical interferometer or telescope array is a set of separate telescopes, mirror segments, or radio telescope antennas that work together as a...

An astronomical constant is any of several physical constants used in astronomy. Formal sets of constants, along with recommended values, have been defined...

generally given using the geodetic normal or the gravity direction. The astronomical longitude can differ slightly from the ordinary longitude because of...

The Astronomical Calculation Institute (German: Astronomisches Rechen-Institut; ARI) is a research institute in Heidelberg, Germany, with origins dating...

Explanatory Supplement to the Astronomical Almanac. University Science Books, Mill Valley, CA. ISBN 0-935702-68-7., p. 11 Astronomical Almanac 2010, sec. C Explanatory...

(degrees below the horizon) in the morning. These are astronomical, nautical and civil twilight. Astronomical dawn begins when the center of the Sun is 18 degrees...

The International Astronomical Union Circulars (IAUCs) are notices that give information about astronomical phenomena. IAUCs are issued by the International...

Astronomical rings (Latin: annuli astronomici), also known as Gemma's rings, are an early astronomical instrument. The instrument consists of three rings...

Gesellschaft is an astronomical society established in 1863 in Heidelberg, the second oldest astronomical society after the Royal Astronomical Society. In 1882...

Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years...

Byzantine, Islamic, and Western European science. The first was his astronomical treatise now known as the Almagest, originally entitled Mathēmatikḗ Syntaxis...

The Exeter Cathedral Astronomical Clock is a fifteenth-century astronomical clock in Exeter Cathedral, England. It displays the hour of the day, the day...

Astronomical Observatories, Chinese Academy of Sciences (NAOC, Chinese: 中国科学院国家天文台; pinyin: Zhōngguó Kēxuéyuàn Guójiā Tiānwéntái) is an astronomical research...

The Rostock astronomical clock is a fifteenth-century astronomical clock in St. Mary's Church, Rostock. The astronomical clock was built in 1472 by Hans...

coordinates) Japan Astronomical Heritage (日本天文遺産, Nihon tenmon isan) is an initiative aimed at the recognition and valorization of the astronomical heritage of...

observatories". www.birtwhistle.org.uk. Retrieved 2026-05-27. "The Isle of Man Astronomical Society ~ Observatory". www.iomastronomy.org. Retrieved 2026-05-27. "MPC...

The Quito Astronomical Observatory (Spanish: Observatorio Astronómico de Quito – OAQ) is a research institute of EPN, the National Polytechnic School in...

The Lyon astronomical clock (French: Horloge astronomique de Lyon) is a seventeenth-century astronomical clock in Lyon Cathedral. The 9 m (30 ft) tall...

The Vilnius University Astronomical Observatory (Lithuanian: Vilniaus universiteto astronomijos observatorija) is an astronomical observatory of Vilnius...

In astronomy, seeing is the degradation of the image of an astronomical object due to turbulence in the atmosphere of Earth that may become visible as...

Sun at the southern solstice Illumination of Earth at each change of astronomical season Animation of Earth as seen daily from the Sun looking at UTC+02:00...

The Nepal Astronomical Society (NASO) is a Nepali learning community of professional astronomers and other interested individuals headquartered in Kathmandu...

The National Astronomical Observatory (Spanish: Observatorio Astronómico Nacional—OAN) is an astronomical observatory in Baja California, Mexico. The observatory...

The Teylers astronomical observatory (Dutch: Teylers Sterrenwacht) is an astronomical observatory built in 1784 on the roof of the Oval Room of the Teylers...

is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the celestial coordinates or orbital elements...

Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including...

Risks of astronomical suffering, also called suffering risks or s-risks, are risks involving much more suffering than all that has occurred on Earth so...

had names. Over the last few hundred years, the number of identified astronomical objects has risen from hundreds to over a billion, and more are discovered...

Eurasian Astronomical Society (EAAS, Russian: Международная общественная организация "Астрономическое общество", romanized: mezhdunarodnaya obshchestvennaya...

The Passemant astronomical clock is an astronomical clock designed by Claude-Simeon Passemant in the eighteenth century. It is displayed in the Salon...

1922611°N 15.5546778°E / 38.1922611; 15.5546778 The astronomical clock of Messina is an astronomical clock in Messina, Sicily, southern Italy, constructed...

The Astronomical Institute of the Romanian Academy was created in 1990 with the union of three astronomical observatories: the Bucharest Astronomical Observatory...

Various unknown astronomical objects have been hypothesized throughout recorded history. For example, in the 5th century BCE, the philosopher Philolaus...

The Israeli Astronomical Association (IAA) is an Israeli nonprofit organization. Its purpose is to deepen and distribute the awareness for the field of...

a book with tables that gives the trajectory of naturally occurring astronomical objects and artificial satellites in the sky, i.e., the position (and...

An astronomical system positing that the Earth, Moon, Sun, and planets revolve around an unseen "Central Fire" was developed in the fifth century BC and...

list of astronomical observatories in Ukraine: Andrushivka Astronomical Observatory Crimean Astrophysical Observatory Mykolaiv Astronomical Observatory...

lunar cycle used by the Church to calculate the date for Easter, because astronomical new moons were occurring four days before the calculated dates. The reform...

Publications of the Astronomical Society of the Pacific (often abbreviated as PASP in references and literature) is a monthly peer-reviewed scientific...

The Gdańsk astronomical clock is a fifteenth-century astronomical clock in St. Mary's Church, Gdańsk, Poland, restored in 1990. It was the largest such...

The Louisville Astronomical Society (LAS) is an American amateur astronomy organization based in Louisville, Kentucky. Founded in 1933, it is a charter...

The Beauvais Astronomical Clock is a nineteenth-century astronomical clock in Beauvais Cathedral in northern France. The clock was built between 1865...

of the widest known in the Solar System. Its aphelion is located 937 astronomical units (AU) away, about 19 times farther than that of Pluto. Sedna's orbit...

astronomical object is a meteorological optical phenomenon, in which light rays are bent to produce distorted or multiple images of an astronomical object...

Wimborne Minster astronomical clock is a fourteenth-century astronomical clock in Wimborne Minster in Dorset, regarded as "one of the most ancient working...

The Bourges astronomical clock is an astronomical clock in Bourges Cathedral in Bourges, France. The clock was designed by Jean Fusoris and installed...

Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky...

This is a list of the highest astronomical observatories in the world, considering only ground-based observatories and ordered by elevation above mean...

the astronomic and geodetic normals is called vertical deflection and is usually a few seconds of arc but it is important in geodesy. Astronomical latitude...

Astronomical was a live event by Travis Scott in Fortnite Chapter 2 Season 2, used to promote the Travis Scott x Fortnite Collaboration. Travis Scott partnered...

Geodetic astronomy or astronomical geodesy (astro-geodesy) is the application of astronomical methods into geodetic networks and other technical projects...

and most commonly associated planetary metals are: The International Astronomical Union (IAU) discourages the use of these symbols in modern journal articles...

The Canton Tower (Chinese: 广州塔), formally Guangzhou TV Astronomical and Sightseeing Tower (Chinese: 广州电视台天文及观光塔), is a 600-metre-tall (2,000 ft) multipurpose...

A planet is a large, rounded astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one...

Astronomical ceiling decoration in its earliest form can be traced to the tomb of Senenmut (Theban tomb no. 353), located at the site of Deir el-Bahri...

Olomouc Astronomical Clock (Czech: Olomoucký orloj) is part of the northern wall of the town hall of Olomouc, Czech Republic. The astronomical clock was...

Astronomical Observatory of Kazan University is a Russian astronomical observatory located in the city of Kazan at an altitude of 75 meters above sea level...

Gregorian Calendar, and from which the unit is named. Nevertheless, because astronomical Julian years are measuring duration rather than designating dates, this...

In astronomy, a conjunction occurs when two astronomical objects or spacecraft appear to be close to each other in the sky. This means they have either...

with eccentricity is that proximity to the Sun occurs during different astronomical seasons. Milankovitch studied changes in these movements of the Earth...

The Danish Astronomical Society (Dansk Astronomisk Selskab) was founded in 1916 'with the purpose of acting for the spread of knowledge and interest in...

The Astronomical Society of India (ASI) is an Indian society of professional astronomers and other professionals from related disciplines. It was founded...

A black hole is an astronomical body so compact that its gravity prevents anything, including light, from escaping. Albert Einstein's theory of general...

Astronomical Data Query Language (ADQL) is a language for astronomical data query based on SQL 92. ADQL is a specialized variant of the SQL query language...

The Irish Astronomical Tract is an Irish text that was created in the first half of the 14th century. It was written in Early Modern Irish and is based...

The European Astronomical Society (EAS) is a learned society, founded under the Swiss Civil Code in 1990, as an association to contribute and promote the...

been an object of veneration in many cultures and a central subject of astronomical research since antiquity. The Sun orbits the Galactic Center at a distance...

During nautical twilight, the horizon is visible enough for navigation. "Astronomical" twilight continues until the Sun has sunk 18 degrees below the horizon...

Pisgah Astronomical Research Institute (PARI; /ˈpæriː/ PAIR-ee) is a non-profit astronomical observatory located in the Pisgah National Forest near Balsam...

Ancient India was one of the most important seat of Astronomical studies. There were many scholars, philosophers and astronomers in ancient India, who...

(also known as the refcode) is a compact identifier used by several astronomical data systems to uniquely specify literature references. The Bibliographic...

Publications of the Astronomical Society of Japan (PASJ) is a peer-reviewed scientific journal of astronomy published by the Astronomical Society of Japan...

The Leicester University astronomical clock is a modern astronomical clock at the University of Leicester. The clock was installed in 1989 on the side...

to observe astronomical objects. Suggested by Lyman Spitzer in 1946, the first operational telescopes were the American Orbiting Astronomical Observatory...

The Sormano Astronomical Observatory (Italian: Osservatorio Astronomico Sormano, obs. code: 587) is an astronomical observatory north of Milan, Italy...

The El Leoncito Astronomical Complex (Spanish: Complejo Astronómico El Leoncito - CASLEO) is an astronomical observatory in the San Juan Province of Argentina...

‹See RfD› Gaocheng Astronomical Observatory, also known as the Dengfeng Observatory, is an observatory in Duke of Zhou's shrine, Gaocheng Town, near Dengfeng...

Central Bureau for Astronomical Telegrams (CBAT) is an official international clearing house for information relating to transient astronomical events. The CBAT...

The Tien Shan Astronomical Observatory (TSHAO, TSAO, or Tien Shan Observatory; observatory code: N42) is an astronomical observatory located in the Tien...

Yunnan Astronomical Observatory (YAO; Chinese: 云南天文台) an institution of Chinese Academy of Sciences sits on the Phoenix Hill in the east suburbs of Kunming...

The Ploërmel Astronomical Clock is a 19th-century astronomical clock in Ploërmel in Brittany, in north-west France. The clock was built and operational...

Shanghai Astronomical Observatory (SHAO) is an astronomical observatory in Shanghai. It has a long history of astrometry and also operates the 25-meter...

(1990-) Astronomical Society Ruđer Bošković Swedish Astronomical Society Airdrie Astronomical Association Astronomical Society of Edinburgh Astronomical Society...

The Brno astronomical clock (Czech: Brněnský orloj) is a black stone monument in Brno, Czech Republic. It is situated at Náměstí Svobody, the main square...

important astronomical datum. It has implications for testing gravitational theories such as general relativity and for refining other astronomical values...

Astronomical chess or Astrological chess is a game for seven players from the book Libro de los Juegos (Book of Games), written under king Alfonso X the...

The Astronomical Society of Southern Africa (ASSA), formed in 1922, is a widespread body consisting of both amateur and professional astronomers. There...

slightly from the month-start-dates of the astronomical lunar calendar,[which?] which are based directly on astronomical calculations. Still, the Islamic calendar...

National Astronomical Observatory - Rozhen, NAO-Rozhen), also known as the Bulgarian National Astronomical Observatory, is an astronomical observatory...

September 27, 1996), known professionally as Stro (formerly Astro and The Astronomical Kid), is an American rapper, producer, and actor. He is known for being...

pronunciation: [d͡ʒən̪t̪ər mən̪t̪ər]) is an assembly of stone-built astronomical instruments, designed to be used with the naked eye. There were five...

romanized: al-Asṭurlāb; Persian: ستاره‌یاب, romanized: Setāreyāb) is an astronomical instrument dating to ancient times. It serves as a star chart and physical...

Astronomical Observatory may refer to: National Astronomical Observatory (Chile) National Astronomical Observatories of China National Astronomical Observatory...

The Minnesota Astronomical Society (MAS) is a non-profit astronomical society based in Minnesota. It is one of only two astronomical societies based in...

Copernicus or OAO-3 (Orbiting Astronomical Observatory 3), also mentioned as Orbiting Astronomical Observatory-C, was a space telescope intended for ultraviolet...

meetings that are not named after organizations Observing program – astronomical programs, often surveys, performed by one or more individuals; may include...

The Astronomical Society of Australia (ASA) is the professional body representing astronomers in Australia. Established in 1966, it is incorporated in...

Astronomical Observatory of Trieste (Italian: Osservatorio Astronomico di Trieste or OAT) is an astronomical center of studies located in the city of Trieste...

The British Astronomical Association (BAA) was formed in 1890 as a national body to support the UK's amateur astronomers. Throughout its history, the BAA...

The Astronomical Observatory of Capodimonte (Italian: Osservatorio Astronomico di Capodimonte) is the Neapolitan department of Istituto Nazionale di Astrofisica...

The Milwaukee Astronomical Society (MAS) is a 501(c)(3) tax-exempt organization serving amateur astronomers in the greater Milwaukee area since 1932, making...

named after its appearance as a milky band of light in the sky. In the astronomical literature, the capitalised word "Galaxy" is often used to refer to the...

The Belgrade Observatory is an astronomical observatory located in the Zvezdara Forest in the eastern part of Belgrade, Serbia. In 1879, Milan Nedeljković...

professional observatory in the United States. It was a key facility for astronomical research and education at the University of Cincinnati, which currently...

In positional astronomy, two astronomical objects are said to be in opposition when they are on opposite sides of the celestial sphere, as observed from...

The Indian Astronomical Observatory (IAO) is a high-altitude astronomy station located in Hanle, Ladakh, India. It is operated by the Indian Institute...

The Dunedin Astronomical Society Incorporated (DAS) is an amateur astronomical group operating from the Beverly-Begg Observatory in Dunedin, New Zealand...

"Mykolaiv Astronomical Observatory", Ukrainian: Науково-дослідницький інститут «Миколаївська астрономічна обсерваторія») is an astronomical observatory...

The Federation of Astronomical Societies (FAS) is an international union of astronomical societies formed in 1974 and celebrated its 50th anniversary in...

The Kapteyn Astronomical Institute is the department of astronomy of the University of Groningen in the Netherlands. The institute is named after its founder...

poles of astronomical bodies are determined based on their axis of rotation in relation to the celestial poles of the celestial sphere. Astronomical bodies...

Ottery St Mary Astronomical Clock is a 14th-century astronomical clock in St Mary's Church, Ottery St Mary, in Devon in south-west England. The south...

Mount Cuba Astronomical Observatory is an astronomical observatory in Greenville, Delaware, United States. It is home to a 0.6-meter telescope used by...

billions, of times the mass of the Sun (M☉). Black holes are a class of astronomical objects that have undergone gravitational collapse, leaving behind spheroidal...

The South African Astronomical Observatory (SAAO) is the national centre for optical and infrared astronomy in South Africa. It was established in 1972...

The Münster astronomical clock is an astronomical clock in Münster Cathedral in Münster, Germany. The clock, built between 1540 and 1542, is one of the...

The Serbian Astronomical Journal is a biannual peer-reviewed scientific journal covering astronomy. The journal is the successor of the Bulletin Astronomique...

Region Astronomical Observatory is an astronomical observatory owned and operated by Oil Region Astronomical Society. The Oil Region Astronomical Society...

The Journal of Astronomical History and Heritage is a peer-reviewed academic journal. As of 2021, the journal is published four times per year and is logged...

has a moderately eccentric and inclined orbit, ranging from 30 to 49 astronomical units (4.5 to 7.3 billion kilometres; 2.8 to 4.6 billion miles) from...

The Astronomical Society of Malta is a non-profit organisation registered in Malta with the aim of promoting education and interest in astronomy. The society...

Sutherland Astronomical Society Incorporated (SASI) (previously known as the James Cook Astronomers Club) is an amateur astronomical society based in...

The Stará Bystrica astronomical clock (Slovak: Slovenský orloj) is an astronomical clock located in the village of Stará Bystrica in the Žilina Region...

The Swedish Astronomical Society (Svenska astronomiska sällskapet) a national organization in Sweden aimed at people who want to follow the achievements...

position of both celestial and terrestrial objects. Astronomical or celestial refraction causes astronomical objects to appear higher above the horizon than...

The Chambliss Astronomical Writing Award is awarded by the American Astronomical Society for astronomy writing for an academic audience, specifically textbooks...

All stars but one can be associated with an IAU (International Astronomical Union) constellation. IAU constellations are areas of the sky. Although there...

Newbrook Observatory (disused) Oldman River Observatory, Lethbridge Astronomical Society, Lethbridge Rothney Astrophysical Observatory, University of Calgary...

The Pistoia Mountains Astronomical Observatory (Italian: Osservatorio Astronomico della Montagna Pistoiese; obs. code: 104), also known as the San Marcello...

("phase angle"), and variation in time composes a major part of the astronomical field of photometry. For small and far objects that cannot be resolved...

Lund astronomical clock, occasionally and at least since the 16th century referred to as Horologium mirabile Lundense (Latin: "the wonderful clock in Lund")...

This is a list of astronomical objects officially recognized by the International Astronomical Union (IAU) whose names originate from Anatolian culture...

The Royal Astronomical Society of Canada (RASC) is a national, non-profit, charitable organization devoted to the advancement of astronomy and related...

Kaohsiung Astronomical Museum (traditional Chinese: 高雄市立天文教育館; simplified Chinese: 高雄市立天文教育馆; pinyin: Gāoxióng Shìlì Tiānwén Jiàoyùguǎn) is an astronomical museum...

Journal of the British Astronomical Association is a peer-reviewed scientific journal of astronomy published by the British Astronomical Association since...

The Islamic Astronomical Bureau was a government agency of Imperial China established in 1271 during the reign of Yuan Emperor Kublai Khan. The bureau...

The National Astronomical Observatory of Chile (Spanish: Observatorio Astronómico Nacional de Chile - OAN) is an astronomical observatory owned and operated...

scientific periodical and trade magazine published on behalf of the Royal Astronomical Society (RAS) by Oxford University Press. It is distributed bimonthly...

The Royal Astronomical Society of New Zealand (RASNZ) is the New Zealand national astronomical society. It is an association of professional and amateur...

The Uppsala Astronomical Observatory (UAO), Astronomiska observatoriet i Uppsala) is the oldest astronomical observatory in Sweden. It was founded in 1741...

The Sternberg Astronomical Institute, or GAISh, is a research institution in Moscow, Russia, a division of Moscow State University. In Russian it is named...

planets and small Solar System bodies, based on its brightness at one astronomical unit from the observer and the Sun. The Sun has an apparent magnitude...

The York Minster astronomical clock is a memorial to the airmen operating from bases in Yorkshire, Durham, and Northumberland who were killed in action...

The Georgetown University Astronomical Observatory (also the Heyden Observatory and Francis J. Heyden Observatory) was founded in 1841 by Father James...

The Gifford Observatory is an astronomical observation facility located in the suburb of Mount Victoria, Wellington, New Zealand. Operated by the Gifford...

Xinjiang Astronomical Observatory (XAO; Chinese: 新疆天文台; pinyin: Xīnjiāng Tiānwéntái) of the Chinese Academy of Sciences was known as Ürümqi Astronomical Observatory...

The Zagreb Astronomical Observatory (Croatian: Zvjezdarnica Zagreb) is the astronomical observatory located in Zagreb, the Croatian capital, and founded...

Besançon astronomical clock is housed in Besançon Cathedral. Auguste-Lucien Vérité of Beauvais designed and built Besançon's present astronomical clock,...

displaying short descriptions of redirect targets Astronomical clock – Clock displaying astronomical information Daytime – Period of a day in which a location...

TOLIMAN (Telescope for Orbit Locus Interferometric Monitoring of our Astronomical Neighbourhood) space telescope is a low-cost mission concept aimed at...

The following table lists the common coordinate systems in use by the astronomical community. The fundamental plane divides the celestial sphere into two...

42 member galaxies were identified and currently listed in the SIMBAD Astronomical Database, though the real number may be as high as 1,000 galaxies. The...

The Lisbon Astronomical Observatory (Portuguese: Observatório Astronómico de Lisboa) is an astronomical observatory located in Tapada da Ajuda, in the...

case it is also known as a tidal datum. Common chart datums are lowest astronomical tide (LAT) and mean lower low water (MLLW). In non-tidal areas, e.g....

The following are lists of stars. Stars are astronomical objects that spend some portion of their existence generating energy through thermonuclear fusion...

Besançon Astronomical Observatory (French: Observatoire de Besançon ou Observatoire des sciences de l'Univers de Besançon) is an astronomical observatory...

astrologers in Norway were among the invited guests at the ceremony. Prague Astronomical Clock IceNews (2010-10-21). "Oslo astrological clock unveiled yesterday...

The Journal of the Royal Astronomical Society of Canada (JRASC, French: Journal de la Société royale d'astronomie du Canada) is a trade magazine and scientific...

Brera Observatory (Italian: Osservatorio Astronomico di Brera) is an astronomical observatory in the Brera district of Milan, Italy. It is currently operated...

The Astronomical Observatory of Cantabria (OAC) is a center of the Ministry of the Environment of the Government of Cantabria, Spain, located in the municipality...

the Korean Astronomical Society is a bimonthly open access peer-reviewed scientific journal of astronomy published by the Korean Astronomical Society. It...

Royal Astronomical Society (prior to 1831 known as President of the Astronomical Society of London) chairs the Council of the Royal Astronomical Society...

position in the sky over time. Stars can form orbital systems with other astronomical objects, as in planetary systems and star systems with two or more stars...

Townsville Astronomical Trigonometrical Station is a heritage-listed triangulation station at Stanton Hill, North Ward, City of Townsville, Queensland...

until the 1940s, astronomers used optical telescopes to observe distant astronomical objects whose radiation reached the earth through the optical window...

These names of stars that have either been approved by the International Astronomical Union or which have been in somewhat recent use. IAU approval comes mostly...

The Astronomical Observatory of Lviv University is the astronomical observatory of the Ivan Franko National University of Lviv in Lviv, Ukraine. It was...

Russian Open School Astronomical Olympiad by Correspondence (ROSAOC) – is an annual international competition for secondary school students in astronomy...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1–1000 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s 9,000s...

The Astronomical Observatory of the University of Warsaw (Polish: Obserwatorium Astronomiczne Uniwersytetu Warszawskiego) is an institute that conducts...

The Astronomical Observatory of La Hita is an astronomical observatory located 9 kilometers from the urban center of the Toledo municipality of La Puebla...

projects managed by the International Astronomical Union (I.A.U.) to encourage names to be submitted for astronomical objects, notably exoplanets. The accepted...

Explanatory Supplement to the Astronomical Almanac. p. 576. Bishop, Roy L., ed. (1991). Observer's handbook. The Royal Astronomical Society of Canada. p. 14...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 4,000s 5,000s 6,000s 7,000s 8,000s 9,000s 10,000s 11,000s 12,000s...

occupying 30° of celestial longitude. These signs roughly correspond to the astronomical constellations with the following modern names: Aries, Taurus, Gemini...

primarily for measuring the position of stars. There are two types of astronomical sextants, mural instruments and frame-based instruments. They are of...

re-definition of the astronomical unit of length" (PDF). International Astronomical Union. 2012. Brumfiel, Geoff (14 September 2012). "The astronomical unit gets...

In astronomy, precession refers to any of several slow changes in an astronomical body's rotational or orbital parameters. An important example is the...

atmosphere, as in the case of stars and planets, the phenomenon is termed astronomical scintillation; for objects within the atmosphere, the phenomenon is termed...

support astronomical scholarship, technological development, education, and the spread of astronomical knowledge. It operates the Arab Astronomical Society...

The adjectival forms of the names of astronomical bodies are not always easily predictable. Attested adjectival forms of the larger bodies are listed below...

with the country's economic capabilities, or even slightly above them. Astronomical Observatory Belgrade (on Zvezdara), founded in 1887, is one of the oldest...

celestial body of the Solar System – thus completing a full cycle of astronomical seasons. For example, it is the time from vernal equinox to the next...

Set of Identifications, Measurements and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System. It is maintained...

The Irish Astronomical Society, the oldest astronomy club in Ireland, was founded in D'Olier Street, Dublin on 5 October 1937. The society holds public...

The refracting telescope design was originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses. Although large...

The Giuseppe S. Vaiana Astronomical Observatory is an astronomical observatory located in Palermo, Sicily, Italy, housed inside the Palazzo dei Normanni...

of astronomical summer and the beginning of astronomical autumn (autumnal equinox) in the Northern Hemisphere, while marking the end of astronomical winter...

the celestial sphere into northern and southern hemispheres. Because astronomical objects are at such remote distances, casual observation of the sky offers...

The Forcarei Astronomical Observatory is an observatory in the municipality of Forcarei, Spain. The observatory is located at 670m altitude, on a hill...

Sun. Baily was also a major figure in the early history of the Royal Astronomical Society, as one of the founders and as the president four times. Baily...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1–1000 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s...

The Tainan Astronomical Education Area (TAEA; traditional Chinese: 南瀛天文教育園區; simplified Chinese: 南瀛天文教育园区; pinyin: Nányíng Tiānwén Jiàoyù Yuánqū) is an...

Astronomische Nachrichten (Astronomical Notes), one of the first international journals in the field of astronomy, was established in 1821 by the German...

The Astronomical Society of Victoria (ASV) is an amateur astronomy club in the state of Victoria, Australia. It was founded in 1922, making it one of the...

(1776–1856). Its designation was formally adopted by the International Astronomical Union in 1970. By convention these features are identified on lunar maps...

followed directly by year AD 1. However, there is a year zero in both the astronomical year numbering system (where it coincides with the Julian year 1 BC)...

The Nottingham Astronomical Society was established in 1946. There is some evidence for a society for people interested in astronomy in the Nottingham...

General Catalogue of Nebulae and Clusters of Stars (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888...

practices of prehistory. Early astronomical records date back to the Babylonians around 1000 BC. There is also astronomical evidence of interest from early...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s 9,000s 10,000s 11,000s...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 5,000s 6,000s 7,000s 8,000s 9,000s 10,000s 11,000s 12,000s 13...

large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (au), i.e., 30...

specific question or field outside the scope of Earth. Astronomers study astronomical objects, such as stars, planets, moons, comets and galaxies, by some...

The Landolt Astronomical Observatory is an astronomical observatory located on the roof of Nicholson Hall at Louisiana State University (LSU) in Baton...

list of NGC objects 1–1000 from the New General Catalogue (NGC). The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies...

and Astronomical Services Administration (full name: Department of Science and Technology-Philippine Atmospheric, Geophysical, and Astronomical Services...

Space art, also known as astronomical art, is a genre of art that visually depicts the universe through various artistic styles. It may also refer to artworks...

The Australian Astronomical Observatory (AAO), formerly the Anglo-Australian Observatory, is an optical and near-infrared astronomy observatory with its...

International Astronomical Union at its 16th General Assembly in Grenoble in 1976, accepted Resolution No. 1 regarding a "New System of Astronomical Constants"...

The Astronomical Observatory of Modra (Slovak: Astronomické observatórium Modra), also known as Modra Observatory or the Astronomical and Geophysical...

evidence—such as archaeological remains, scientific dating methods, astronomical records as well as calendars in other European countries, most of Asia...

studied part of the sky. Many astronomical observations were made on SN 1987A, including the only measurements of astronomical neutrinos other than the Sun's...

Irish Federation of Astronomical Societies (IFAS) is an umbrella group comprising most of the National and Regional Astronomical Societies on the Island...

atmosphere can vary the radius by up to 4 km. In 2015, the International Astronomical Union defined the nominal equatorial Jovian radius as a set number of...

British publication, The Nautical Almanac and Astronomical Ephemeris, with which it merged to form The Astronomical Almanac, published from the year 1981 to...

The Molėtai Astronomical Observatory (MAO; Molėtų astronomijos observatorija in Lithuanian) is an astronomical observatory owned and operated by Vilnius...

The Observatory of Strasbourg is an astronomical observatory in Strasbourg, France. This observatory is actually Strasbourg's third observatory: the first...

The Northumberland Astronomical Society was founded in 2000 by local amateur astronomers in Northumberland, UK. The society is informally known among its...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s 9,000s 10,000s...

Astronomy Bulletin of the American Astronomical Society Bulgarian Astronomical Journal Bulletin of the Astronomical Society of India Celestial Mechanics...

Astronomical Society Ruđer Bošković (Serbian: Астрономско друштво Руђер Бошковић, romanized: Astronomsko društvo Ruđer Bošković) is an astronomical society...

prepared by Richard Somer, approved by the group, and the Mohawk Valley Astronomical Society was born. The founders were Richard Somer, Arlene Somer, Joe...

greater than 1 for redshifts and less than 1 for blueshifts). Automated astronomical redshift surveys are an important tool for learning about the large-scale...

complete description of its astronomic gear trains. At the court of William IV, Landgrave of Hesse-Kassel two complicated astronomic clocks were built in 1561...

Though the terms astronomical "body" and astronomical "object" are often used interchangeably, there are technical distinctions. astronomical catalogue A list...

Achievement Award of the Astronomical Society of the Pacific, is one of nine annual astronomical awards managed by the Astronomical Society of the Pacific...

A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations...

to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit. If sufficiently close and bright, a comet may be seen from Earth...

is eccentric, so that the distance between A and B varies from 35.6 astronomical units (AU), or about the distance between Pluto and the Sun, to 11.2...

Bulletin of the American Astronomical Society (BAAS; Bull. Am. Astron. Soc.) is the journal of record for the American Astronomical Society established in...

Αστεροσκοπείο Πεντέλης), also known as the Penteli Astronomical Station (Αστρονομικός Σταθμός Πεντέλης), is an astronomical observatory in Penteli, Greece, operated...

(2005). How degenerate stars came to be known as 'white dwarfs'. American Astronomical Society meeting 207. Vol. 207. p. 1503. Bibcode:2005AAS...20720501H....

the other hand, the official working definition by the International Astronomical Union (IAU) allows only exoplanets with a maximum mass of 13 MJ, that...

are intended to allow viewers to watch as they fall asleep. An astronomical (or astronomic) timer calculates dawn and dusk times (tracking the sun position)...

by the Institute of Theoretical Physics and Astronomy in Vilnius for astronomical institutions of the Baltic states. The political liberation in the then...

Macarthur Astronomical Society is an organisation of amateur astronomers, based in the Macarthur Region of outer South Western Sydney, New South Wales...

officially named the Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, is the principal astronomical observatory of the Russian...

Cathedral astronomical clock was the earliest example of a large clock with automata in England, and the first to possess an astronomical dial. It replaced...

a radius estimated at 909 solar radii (632 million kilometres; 4.23 astronomical units), thus a volume of 750 million times that of the Sun. This estimate...

Mansfield and Sutton Astronomical Society (MSAS) is an amateur astronomical society in the East Midlands of England. It was formed in 1969. It is based...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1–1000 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s...

Kiso Observatory (Japanese: 木曽観測所: Kiso Kansokujo) is an astronomical observatory located at Mt. Ontake in Japan. The observatory was founded in 1974,...

born June 21, 1927) is a Chinese astronomer and professor at Shanghai Astronomical Observatory, known for achieving one of the world's most precise measurements...

The Eddington Medal is awarded by the Royal Astronomical Society for investigations of outstanding merit in theoretical astrophysics. It is named after...

The Snake Valley Astronomical Association (SVAA) is an amateur astronomy club based in Snake Valley, Victoria, Australia. Established in 2005, membership...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 6,000s 7,000s 8,000s 9,000s 10,000s 11,000s 12,000s 13,000s 14...

Observatory is an astronomical observatory jointly operated by Louisiana State University's astronomy department, Baton Rouge Astronomical Society, and The...

This timeline of astronomical maps, catalogs and surveys spans over four millennia of observations. c. 1800 BCE — Babylonian star catalog (see Babylonian...

The Shreveport-Bossier Astronomical Society, Inc. is a 501(c)(3) tax-exempt organization and one of the oldest continuously meeting astronomy clubs in...

for the construction of new telescopes. Herschel pioneered the use of astronomical spectrophotometry, using prisms and temperature measuring equipment to...

The Khurel Togoot Astronomical Observatory (Mongolian: Хүрэл Тогоот Одон Орон Геофизикийн Хүрээлэн) is an astronomical oservatory in Bogd Khan Mountain...

specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 8,000s 9,000s 10,000s 11,000s 12,000s 13,000s 14,000s 15,000s...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 16,000s 17,000s 18,000s 19,000s 20,000s 21,000s 22,000s 23,000s...

evidence most often cited in support of the Big Bang model. The motion of astronomical objects due solely to this expansion is known as the Hubble flow. It...

of astronomical tables that second century astronomer Ptolemy created after finishing the Almagest. The Handy Tables elaborated the astronomical tables...

and equinoxes representing the midpoints of each season, however, the astronomical vernal equinox (varying between 19 and 21 March) can be taken to mark...

The Astronomical Society of Glasgow (ASG) was founded in 1954 in Glasgow, Scotland, by amateur astronomers and is dedicated to promoting an interest in...

national astronomical society based in the United Kingdom for beginners to amateur astronomy. It was founded in 1953 as the Junior Astronomical Society...

The Gold Medal of the Royal Astronomical Society is the highest award given by the Royal Astronomical Society (RAS). It usually recognises lifetime achievement...

Astronomsko društvo Labod (Slovenian for Cygnus Astronomical Society) is the most active Slovenian astronomical society. It organises astronomy camps, lectures...

North Georgia Astronomical Observatory is an astronomical observatory owned and operated by University of North Georgia. It is located in Dahlonega, Georgia...

astronomer Charles Messier to include many of them in his catalog of astronomical objects that he thought could be mistaken for comets. Using larger telescopes...

period, by the time of King Wu Ding (1250–1192 BCE). Detailed records of astronomical observations began during the Warring States period (fourth century BCE)...

The Astronomical Observatory of the University of Valencia (Valencian: Observatori Astronòmic de la Universitat de València, Spanish: Observatorio Astronómico...

Tool for Astrophysical Insight. Astronomical Society of the Pacific conference series. Vol. 60. San Francisco: Astronomical Society of the Pacific. pp. 3–14...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1–1000 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s...

is monitored by the PAGASA (Philippine Atmospheric, Geophysical and Astronomical Services Administration). Monsoons are large-scale sea breezes which...

Martin Chaloupka's astronomical clock is an astronomical clock in Liberec District, Czech Republic. It was built in 2006–2011 in Kryštofovo Údolí, and...

its variable-star designation and the name most frequently used in the astronomical literature, but it also has the official proper name Blaze Star. The...

Nibiru-Astronomical Society (Spanish: Sociedad Astronomica) is a non-profit academic and student astronomical society created at the Faculty of Sciences...

Κρυονερίου), also known as the Kryoneri Astronomical Station (Αστρονομικός Σταθμός Κρυονερίου), is an astronomical observatory in Corinthia, Greece, operated...

subroutines that implement official International Astronomical Union (IAU) algorithms for astronomical computations. As of February 2009 they are available...

Kyung Hee Astronomical Observatory is an astronomical observatory owned and operated by Kyung Hee University. It is located in Giheung-gu, Yongin, South...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 15,000s 16,000s 17,000s 18,000s 19,000s 20,000s 21,000s 22,000s...

Solar System – known as exoplanets – are chosen by the International Astronomical Union (IAU) through public naming contests known as NameExoWorlds. The...

one of the modern 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle...

Steidel et al. Matsuda et al., using the Subaru Telescope of the National Astronomical Observatory of Japan extended the search for LABs and found over 30 new...

is a Japanese amateur astronomer who operates from his private Aoki Astronomical Observatory (908) at Toyama, Toyama Prefecture, Japan. His main interest...

is an astronomical observatory established in 1953, in San Juan Province, Argentina. In 1974, it was renamed to Carlos Ulrrico Cesco Astronomical Station...

the Oort Cloud: Algol and Gliese 710. American Astronomical Society 191st meeting. American Astronomical Society. Bibcode:1997AAS...191.6906M. A. Higuchi;...

1021 kilograms are known or expected to be approximately spherical. Astronomical bodies relax into rounded shapes (spheroids), achieving hydrostatic equilibrium...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 19,000s 20,000s 21,000s 22,000s 23,000s 24,000s 25,000s 26,000s...

the substellar nature of low-luminosity and low-surface-temperature astronomical bodies. High-quality spectral data acquired by the Keck 1 telescope in...

Valderredible is a municipality in Cantabria, Spain. The Astronomical Observatory of Cantabria is located here. National Statistics Institute (13 December...

Payne was elected to the Royal Astronomical Society. Later, she became the first recipient of the American Astronomical Society’s prestigious Annie Jump...

TAU (Thousand Astronomical Units) was a proposed uncrewed interstellar probe that would go to a distance of one thousand astronomical units (1000 AU)...

The Carinthian Astronomical Association (CAA – German: Astronomische Vereinigung Kärntens, AVK) Is the second great astronomical association in Austria...

mainly with the idea that the direction of each groove might be given an astronomical interpretation, where each groove would mark a sightline towards a certain...

proposes that the organization of hymns in the Rig Veda was dictated by an astronomic code concerning the courses of planets—length of solar year and lunar...

The Celestial police (German: Himmelspolizey), officially the United Astronomical Society (German: Vereinigte Astronomische Gesellschaft), was a cooperation...

The V. P. Engel'gardt Astronomical Observatory (Russian: Астрономическая обсерватория им. В. П. Энгельгардта), also known simply as the Engelhardt Observatory...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 11,000s 12,000s 13,000s 14,000s 15,000s 16,000s 17,000s 18,000s...

Kottamia Astronomical Observatory is the largest telescope in the Arab world, including the Middle East and North Africa. The telescope, which is located...

The Astronomical Image Processing System (AIPS) is a software package to support the reduction and analysis of data taken with radio telescopes. Developed...

The Southland Astronomical Society is the southernmost astronomical society in the world. Based in Invercargill at the southern tip of New Zealand's South...

Beijing Astronomical Observatory (BAO) is an observatory in Chaoyang District, Beijing, China. It was founded in 1958 and is part of the Chinese Academy...

The International Astronomical Youth Camp (IAYC) is an annual summer camp for young people aged 16–24 with an interest in astronomy. Established in 1969...

The Astronomical Netherlands Satellite (ANS; also known as Astronomische Nederlandse Satelliet) was a space-based X-ray and ultraviolet telescope. It was...

However, these names fell out of favor until the 20th century. The astronomical literature instead simply referred to "Jupiter I", "Jupiter II", etc...

over time. /ˈbeɪtəlˌɡiːs/; /ˈbɛtəlˌɡiːs/, In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize...

The Polish Astronomical Society (Polish: Polskie Towarzystwo Astronomiczne, PTA) is science society in Poland, founded in 1923, with headquarters in Warsaw...

and latitudes of cities and localities. He further produced a set of astronomical tables and wrote about calendric works, as well as the astrolabe and...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 24,000s 25,000s 26,000s 27,000s 28,000s 29,000s 30,000s 31,000s...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 14,000s 15,000s 16,000s 17,000s 18,000s 19,000s 20,000s 21,000s...

AMBER, the Astronomical Multi-Beam Recombiner, is an instrument mounted on the Very Large Telescope (VLT), combining the light of the three Unit Telescopes...

Telluric contamination is contamination of the astronomical spectra by the Earth's atmosphere. Most astronomical observations are conducted by measuring photons...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 9,000s 10,000s 11,000s 12,000s 13,000s 14,000s 15,000s 16,000s...

Time-domain astronomy is the study of how astronomical objects change with time. Said to have begun with Galileo's Letters on Sunspots, the field has now...

to keep the calendar year synchronised with the astronomical year or seasonal year. Since astronomical events and seasons do not repeat in a whole number...

The Hellenic Astronomical Society (Hel.A.S.), in Greek Ελληνική Αστρονομική Εταιρεία (ΕΛ.ΑΣ.ΕΤ.), is a scientific non profit society of professional astronomers...

literature. The university has one of two astronomical observatories for education in the country. In 2010 the astronomical centre celebrated its 10th anniversary...

An Earth mass (denoted as M🜨, M♁ or ME, where 🜨 and ♁ are the astronomical symbols for Earth), is a unit of mass equal to the mass of the planet Earth...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 22,000s 23,000s 24,000s 25,000s 26,000s 27,000s 28,000s 29,000s...

8 ly) considered among the most likely candidates. The International Astronomical Union has assigned proper names to some known extrasolar bodies, including...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 10,000s 11,000s 12,000s 13,000s 14,000s 15,000s 16,000s 17,000s...

An interstellar object is an astronomical object in interstellar space, not gravitationally bound to a star. The term is used for objects including some...

Simon Marius gradually gained universal acceptance. The International Astronomical Union (IAU) eventually started officially approving names in the late...

The Taipei Astronomical Museum (traditional Chinese: 臺北市立天文科學教育館; simplified Chinese: 台北市立天文科学教育馆; pinyin: Táiběishìlì Tiānwén Kēxué Jiàoyùguǎn) is a museum...

Andrew (2014). "Human contrast threshold and astronomical visibility". Monthly Notices of the Royal Astronomical Society. 442 (3): 2600–2619. arXiv:1405.4209...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 27,000s 28,000s 29,000s 30,000s 31,000s 32,000s 33,000s 34,000s...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 17,000s 18,000s 19,000s 20,000s 21,000s 22,000s 23,000s 24,000s...

detection due to the limited sensitivity, and relative remoteness, of astronomical observatories and due to the sometimes overwhelming spectral absorption...

Fanzago's astronomical clock is an astronomical clock in Clusone, Italy. It is housed in a medieval tower in the southwest corner of the Palazzo Comunale [it]...

The Helmut Ullrich Astronomical Observatory is an observatory situated on Col Drusciè, a mountain peak in the Dolomites located within Cortina d'Ampezzo...

The Hamilton Astronomical Society Observatory is located next to the Hamilton Zoo in Brymer Road to the west of Hamilton City, New Zealand. The Hamilton...

of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the...

Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity, which tends to draw matter inward toward the...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 20,000s 21,000s 22,000s 23,000s 24,000s 25,000s 26,000s 27,000s...

asterisms in or near the respective sectors. In essence (in Western astronomical terms), a nakshatra simply is a constellation. Every nakshatra is divided...

Swedish: Storheikkilä observatorium) is an amateur astronomical observatory used by a local amateur astronomical association, Turun Ursa ry in the Iso-Heikkilä...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 7,000s 8,000s 9,000s 10,000s 11,000s 12,000s 13,000s 14,000s 15...

Timișoara Astronomical Observatory is a research institute in Timișoara, Romania, founded on 7 December 1962 by Ioan Curea [ro]. The scientific activity...

stars. Originally, the term "nebula" was used to describe any diffused astronomical object, including galaxies beyond the Milky Way. The Andromeda Galaxy...

widely recognised or are not officially recognised by the International Astronomical Union (IAU). Prior to 1930, many of these defunct constellations were...

The Orbiting Astronomical Observatory 2 (OAO-2, nicknamed Stargazer) was the first successful space telescope (first space telescope being OAO-1, which...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 12,000s 13,000s 14,000s 15,000s 16,000s 17,000s 18,000s 19,000s...

An astrophysical jet is an astronomical phenomenon where ionised matter is expelled at high velocity from an astronomical object, in a pair of narrow streams...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 23,000s 24,000s 25,000s 26,000s 27,000s 28,000s 29,000s 30,000s...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1–1000 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s...

one of the 88 modern constellations designated by the International Astronomical Union. It is unique among the modern constellations in being split into...

radius and luminosity of Tau Ceti can be estimated. However, using an astronomical interferometer, measurements of the radius of the star can be made directly...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 25,000s 26,000s 27,000s 28,000s 29,000s 30,000s 31,000s 32,000s...

The Observatory of Bologna is an astronomical observatory in Bologna, Italy. Built in 1726, it was the first public observatory in Italy. It is one of...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 26,000s 27,000s 28,000s 29,000s 30,000s 31,000s 32,000s 33,000s...

The Jantar Mantar is a collection of 19 astronomical instruments built by the Rajput king Sawai Jai Singh, the founder of Jaipur, Rajasthan. The monument...

B), it makes a star system with an orbital separation of at least 680 astronomical units, or 680 times the average distance from Earth to the Sun. The companion...

after, or have names associated with, places around the world or among astronomical objects. 32 of these have names tied to the Earth and the other 10 have...

This is a list of astronomical objects named after people. While topological features on Solar System bodies — such as craters, mountains, and valleys...

Polaris B, a 1.39 M☉ F3 main-sequence star orbiting at a distance of 2,400 astronomical units (AU), and Polaris Ab (or P), a very close F6 main-sequence star...

The Edinburgh Astronomical Institution was founded in 1811 and wound up in 1847. It was instrumental in the foundation of the Royal Observatory, Edinburgh...

voyages drove the development of the most accurate pendulum clocks, called astronomical regulators. These precision instruments, installed in clock vaults in...

Southland Astronomical Society Observatory in Invercargill is New Zealand's southernmost observatory. Operated by Southland Astronomical Society but owned...

Milanković, the other for Zvezdara, the hill in Belgrade where the Belgrade Astronomical Observatory is located. Asteroid 1555 Dejan, discovered by Fernand Rigaux...

located between the orbits of Mars and Jupiter, approximately 2 to 4 astronomical units (AU) from the Sun, in a region known as the main asteroid belt...

by the American Astronomical Society to a young (less than age 36) astronomer for outstanding achievement in observational astronomical research. The prize...

have formed in a way similar to how stars form, and the International Astronomical Union has proposed that such objects be called sub-brown dwarfs. A possible...

constellation's three-letter abbreviation, as adopted by the International Astronomical Union in 1922, is "Ori". Orion is most visible in the evening sky from...

also obeys the perfect cosmological principle, but it cannot explain astronomical observations consistent with expansion of space. From the 1940s to the...

taught. In this way, the discovery of variable stars contributed to the astronomical revolution of the sixteenth and early seventeenth centuries. The second...

86°30′45″W / 34.749649°N 86.512406°W / 34.749649; -86.512406 The Von Braun Astronomical Society is a society of amateur and professional astronomers dedicated...

to be closer. Because of its proximity it is a frequent subject for astronomical surveys and other research and thus is known by numerous other designations...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 18,000s 19,000s 20,000s 21,000s 22,000s 23,000s 24,000s 25,000s...

that is based on the Julian calendar. Hindu calendar family – shared astronomical roots Vikram Samvat Shaka Samvat Buddhist calendar Burmese calendar (Pyu...

stars by the Moon or asteroids, as well as by discovering transient astronomical events, such as comets, galactic novae or supernovae in other galaxies...

The following is a list of astronomical instrument makers, along with lifespan and country of work, if available. Contents:  Top 0–9 A B C D E F G H I...

symbols and the oldest monument of the city, and with its 15th-century astronomical clock, a major tourist attraction. It is a heritage site of national...

abundance of dated astronomical records in cuneiform texts from Mesopotamia is of little use for dating of events, as the astronomical phenomena they describe...

The Canadian Astronomical Society (CASCA; French: La Société Canadienne d'Astronomie) is a Canadian society of professional astronomers, founded in 1971...

the term 'new moon', which is still sometimes used in calendrical, non-astronomical contexts, is the first visible crescent of the Moon after conjunction...

= 14600 km/s". Astronomical Journal 107: 1444. Wells, L. A. et al. (1994). "The Type Ia Supernova 1989B in NGC3627 (M66)". Astronomical Journal 108: 2233...

a study of the works of Dante, which led to her lifelong interest in astronomical references in Dante's poems. In 1890, Orr moved with her family to Australia...

precise observation of star positions. They were previously widely used in astronomical observatories and naval observatories to measure star positions in order...

orally, through ceremonies, and in their artwork of many kinds. The astronomical systems passed down thus show a depth of understanding of the movement...

Beta Cygni (β Cygni, abbreviated Beta Cyg, β Cyg). The International Astronomical Union uses the name "Albireo" specifically for the brightest star in...

later year for most definitions. In the "astronomical" reckoning, the timing of "winter" is based on astronomical fixed points (i.e., based solely on the...

According to the International Astronomical Union (IAU), a minor planet is an astronomical object in direct orbit around the Sun that is exclusively classified...

holes. A black hole of this mass has a Schwarzschild radius of 1,300 astronomical units (194 billion kilometres; 0.0206 light-years) or 283,000 solar radii...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 1–1000 1,000s 2,000s 3,000s 4,000s 5,000s 6,000s 7,000s 8,000s...

notable observatories in Germany, Italy and France. He founded the Uppsala Astronomical Observatory in 1741, and in 1742 proposed (an inverted form of) the centigrade...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 29,000s 30,000s 31,000s 32,000s 33,000s 34,000s 35,000s 36,000s...

These are lists of planets. A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet...

The Astronomical Observatory of Mallorca (Spanish: Observatorio Astronómico de Mallorca, OAM) is an observatory just south of Costitx, Mallorca, Spain...

A Massive Compact Halo Object (MACHO) is a kind of astronomical body that might explain the apparent presence of dark matter in galactic halos. A MACHO...

The Manchester Astronomical Society is an organisation that promotes popular and amateur astronomy in North West England. It is one of the oldest provincial...

of nearest known black holes List of the most distant astronomical objects Lists of astronomical objects List of fastest rotating black holes Merritt,...

for example, the Astronomical Almanac for the Year 2017 tabulated it in degrees, minutes, and seconds. As an example, the Astronomical Almanac for the...

The Astronomical Society of South Australia (ASSA) was founded in 1892 and is the oldest society of its kind in Australia. It is the only representative...

Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). 40 Eridani C also bears the variable star designation DY Eridani...

the methods and principles of physics and chemistry in the study of astronomical objects and phenomena including the universe. As one of the founders...

The Sion astronomical clock is an astronomical clock at the town hall of Sion in the canton of Valais, Switzerland. The clock was first installed in 1667–68;...

awarded annually by the High Energy Astrophysics division of the American Astronomical Society "for a significant contribution to High Energy Astrophysics,...

Yuba City Astronomical Observatory is an astronomical observatory owned by the Doscher Family Trust and operated primarily by trustee Richard J. Doscher...

Bangladesh Astronomical Association (Bengali: বাংলাদেশ অ্যাস্ট্রোনমিক্যাল অ্যাসোসিয়েশন) is a Bangladeshi learned society of astronomers. Bangladesh Astronomical...

calculation of the positions and movements of astronomical bodies, as well as being a founder of the British Astronomical Association. Downing was born in County...

Johannes Kamateros' 12th century Compendium of Astrology. The modern astronomical symbol for the Sun, a circled dot (U+2609 ☉ SUN), was first used in the...

statistical artifacts. The Infrared Astronomical Satellite (IRAS) failed to discover Nemesis in the 1980s. The 2MASS astronomical survey, which ran from 1997...

Observatorio Astronómico de La Sagra; OLS; observatory code: L98) is an astronomical observatory located in the province of Granada, Spain. It uses four robotic...

The Nicolaus Copernicus Astronomical Center (Polish: Centrum Astronomiczne im. Mikołaja Kopernika), also CAMK or NCAC, is a Polish scientific research...

European Southern Observatory (Italy has been an ESO member since 1982) the astronomical observatories located in Canary Islands (Teide Observatory and Roque...

3×10−23 W/(m2⋅Hz) (2.3×103 jansky). It remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass...

observed object and the light reflected from the object. In the context of astronomical observations, this is usually the angle Sun-object-observer. For terrestrial...

the Sun. One nominal solar luminosity is defined by the International Astronomical Union to be 3.828×1026 W. This corresponds almost exactly to a bolometric...

his institutional base for the decades to come and a major center of astronomical research. He also co-founded the Armenian Academy of Sciences and led...

The Norwegian Astronomical Society (Norwegian: Norsk Astronomisk Selskap) is a Norwegian organization active in astronomy research, education and outreach...

Kourovka Astronomical Observatory, officially known as K.A. Barkhatova Kourovka Astronomical Observatory, is an observatory in Kourovka, Sverdlovsk Oblast...

Publications of the Astronomical Society of Australia is a peer-reviewed scientific journal covering all aspects of astrophysics and astronomy. The Editor-in-Chief...

Suhora Observatory (Polish: Obserwatorium astronomiczne na Suhorze) is an astronomical observatory owned and operated by the Astronomy department of the Pedagogical...

Gemini by Willem Blaeu, 1602 White and Black Geminis by Arija, 1904 Astronomical symbols Chinese zodiac Circle of stars Cusp (astrology) Elements of the...

Jesus. Scholars have correlated Jewish and Greco-Roman documents and astronomical calendars with the New Testament accounts to estimate dates for the major...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 13,000s 14,000s 15,000s 16,000s 17,000s 18,000s 19,000s 20,000s...

Observatory and is operated by the Vatican Observatory, one of the oldest astronomical research institutions in the world, in partnership with The University...

include the candidate JWST dark stars, with estimated radii of up to 61 astronomical units (13,000 R☉) or quasi-stars, with theoretical models suggesting...

Korean Astronomical Society (Korean: 한국천문학회; Hanja: 韓國天文學會) is a non-profit learned society in South Korea that aims to supporting astronomical scholarship...

as the dates of eclipses of the moon. (…) The golden hats show that astronomical knowledge was combined with cult activities… They were apparently worn...

Journal of Astronomical Telescopes, Instruments, and Systems is a quarterly, peer-reviewed scientific journal covering the development, testing, and application...

This is a list of astronomical objects formerly widely considered planets under any of the various definitions of this word in the history of astronomy...

The Bulletin of the Astronomical Society of India is the official quarterly peer-reviewed scientific journal of the Astronomical Society of India established...

of the Astronomical Observatory of the University of Warsaw. He is also head of the Department of Observational Astrophysics at Astronomical Observatory...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 28,000s 29,000s 30,000s 31,000s 32,000s 33,000s 34,000s 35,000s...

the planet was designated HD 104985 b. In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain...

Michael W. Carroll is an astronomical artist and science writer. His art has appeared in magazines such as TIME, National Geographic, and Astronomy, and...

vin-AT-iss-eye) is one of the 88 constellations designated by the International Astronomical Union (IAU). It is a small northern constellation that was created by...

negative (BC) year and a positive (AD) year. This is the convention in astronomical year numbering and the international standard date system, ISO 8601....

A minor-planet moon is an astronomical object that orbits a minor planet as its natural satellite. As of May 2026[update], there are 625 minor planets...

The Russian Astronomical Society (Russian: Русское астрономическое общество) was a society established in Saint Petersburg, Russia in 1891 for the promotion...

– Wave – Waveform Absorption spectroscopy – Anders Jonas Ångström – Astronomical spectroscopy – Astronomy – Black body – Blazar – Bremsstrahlung – Caesium...

the dominant mode of energy transport. Determining the distances to astronomical objects is crucial to understanding them, but the vast majority of objects...

reflector's optical path with a Schmidt corrector plate to make a compact astronomical instrument that uses simple spherical surfaces. The American astronomer...

the Working Group for Small Bodies Nomenclature of the International Astronomical Union. 21,000s 22,000s 23,000s 24,000s 25,000s 26,000s 27,000s 28,000s...

Howrah Planetarium and Astronomical Research Centre commonly known as Howrah Planetarium is a planetarium in Howrah, West Bengal, that offers virtual tours...

went into operation in 1937. Since then, a large variety of complex astronomical instruments have been developed. Since the atmosphere is opaque for most...

described as binary planets. At its 2006 General Assembly, the International Astronomical Union considered a proposal that Pluto and Charon be reclassified as...

The Infrared Astronomical Satellite (Dutch: Infrarood Astronomische Satelliet) (IRAS) was the first space telescope to perform a survey of the entire night...

Maya astronomy is the study of the Moon, planets, Milky Way, Sun, and astronomical phenomena by the Precolumbian Maya civilization of Mesoamerica. The Classic...

astronomisch-historische Untersuchung, meaning in English: The Revelation to John: An Astronomic Historical Investigation). After intervention by the Orthodox clergy,...

President Jefferson would become known as his Astronomical Case Clock. Voigt completed Jefferson's Astronomical Case Clock in 1812, but due to the War of...

by Laurent Bernasconi in 1999, was named in his honour. International Astronomical Union Circular List of French astronomers List of minor planet discoverers...

galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors...

announced his debut mixtape, Astronomical, and released the single "Razor's Edge", which features X Ambassadors. Astronomical was released on 10 September...

The International Astronomical Union (IAU) adopted in August 2006 the definition made by Uruguayan astronomers Julio Ángel Fernández and Gonzalo Tancredi...

Shostak, Seth (ed.). Astronomical Society of the Pacific Conference Series. Progress in the Search for Extraterrestrial Life. Astronomical Society of the Pacific...

measure of the luminosity of a celestial object on an inverse logarithmic astronomical magnitude scale; the more luminous (intrinsically bright) an object,...