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langs: 21 июля [ru] / july 21 [en] / 21. juli [de] / 21 juillet [fr] / 21 luglio [it] / 21 de julio [es]

days: july 18 / july 19 / july 20 / july 21 / july 22 / july 23 / july 24

Asteroid / Asteroid


#1 2017 OO1

2017 OO 1 is a small asteroid , classified as near-Earth object of the Aten group , approximately 35–76 meters (115–249 feet) in diameter. It was first observed on 23 July 2017, by the robotic ATLAS survey at Mauna Loa Observatory , Hawaii, two days after the object had approached Earth at 0.33 luna

#2 17035 Velichko

17035 Velichko , provisional designation 1999 FC 10 , is a Vestian asteroid from the inner regions of the asteroid belt , approximately 4.5 kilometers in diameter. 17035 Velichko Discovery [1] Discovered   by LONEOS Discovery   site Anderson Mesa Stn. Discovery   date 22 March 1999 Designations MPC

#3 1096 Reunerta

1096 Reunerta , provisional designation 1928 OB , is an asteroid from the background population of the asteroid belt 's central region, approximately 40 kilometers in diameter. It was discovered on 21 July 1928, by astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. [

#4 (44594) 1999 OX3

(44594) 1999 OX 3 is an eccentric trans-Neptunian object with a centaur -like orbit from the outer Solar System , approximately 150 kilometers in diameter. [3] It was discovered on 21 July 1999, by astronomers John Kavelaars , Brett Gladman , Matthew Holman and Jean-Marc Petit at Mauna Kea Observato

#5 2016 NL56

2016 NL 56 (also written 2016 NL56 ) is a near-Earth object (NEO) and a potentially hazardous object (PHA), meaning that it has an orbit that can make close approaches to the Earth and large enough to cause significant regional damage in the event of impact. It is an Apollo asteroid , meaning that i

#6 51829 Williemccool

51829 Williemccool , provisional designation 2001 OD 41 , is a Vestian asteroid from the inner regions of the asteroid belt , approximately 2 kilometers in diameter. It was discovered on 21 July 2001, by astronomers of the Near-Earth Asteroid Tracking program at Palomar Observatory in California, Un

#7 (4953) 1990 MU

(4953) 1990 MU ( prov. designation : 1990 MU ) is a large Earth-crossing asteroid (ECA) belonging to the Apollo group of near-Earth objects which also cross the orbits of Mars and Venus . At approximately 3   km in diameter, [3] it is one of the largest known ECAs. [4] It has been assigned a permane

#8 (163364) 2002 OD20

(163364) 2002 OD 20 is an asteroid , classified as a near-Earth object and potentially hazardous asteroid of the Apollo group , likely smaller than one kilometer in diameter. [1] [3] (163364) 2002 OD 20 Discovery [1] Discovered   by NEAT Discovery   site Palomar Obs. Discovery   date 21 July 2002 De

#9 120347 Salacia

120347 Salacia , provisional designation 2004 SB 60 , is a large planetoid in the Kuiper belt , approximately 850 kilometers in diameter. As of 2018, it is located 44.8 astronomical units from the Sun , and reaches apparent magnitude 20.7 at opposition . Possible dwarf planet 120347 Salacia Salacia

#10 List of minor planets discovered using the WISE spacecraft

The following is a list of numbered minor planets discovered, co-discovered and re-discovered by the Wide-field Infrared Survey Explorer (WISE), a NASA infrared spaceborne observatory. As of July 2018, the list contains 4093 entries, accredited by the Minor Planet Center as discovered by "WISE". Not


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Comet / Comet


#1 C/1874 H1

C/1874 H1 (Coggia) is a famous non-periodic comet , which in the summer of 1874 could be seen by naked eye observation. On the basis of its brightness, the comet has been called the Great Comet of 1874; on July 13 the magnitude of the brightness was between 0 and 1. [2] C/1874 H1 (Coggia) Drawing of

#2 C/1911 O1

C/1911 O1 (Brooks) , also designated 1911 V or Comet Brooks, was a bright comet discovered in July 1911 by astronomer William Robert Brooks . C/1911 O1 (Brooks) C/1911 O1 Discovery Discovered by William Robert Brooks Discovery date July 21, 1911 Alternative designations 1911 V, 1911c, Comet Brooks O

#3 Comet NEOWISE

C/2020 F3 (NEOWISE) or Comet NEOWISE is a long period comet with a near-parabolic orbit discovered on March 27, 2020, by astronomers during the NEOWISE mission of the Wide-field Infrared Survey Explorer (WISE) space telescope . At that time, it was an 18th-magnitude object, located 2   AU (300   mil

#4 44P/Reinmuth

44P/Reinmuth or Reinmuth 2 is a Jupiter-family comet that is greatly perturbed by the gas giant Jupiter . [2] The diameter of this comet is estimated at 3.22   km and its absolute magnitude at 11. [1] Periodic comet with 7 year orbit 44P/Reinmuth Discovery Discovered by Karl Reinmuth [1] Discovery d

#5 52P/Harrington–Abell

52P/Harrington–Abell is a periodic comet in the Solar System . Periodic comet with 7 year orbit 52P/Harrington–Abell 52P/Harrington–Abell in 1998 Discovery Discovered by Robert G. Harrington George O. Abell Discovery date March 22, 1955 Alternative designations 1954 XIII; 1962 II; 1969 III; 1976 VII

#6 C/1957 P1 (Mrkos)

Comet Mrkos , formally known as C/1957 P1 (old style 1957d ), was a non-periodic comet discovered in 1957 by Antonín Mrkos . It was one of two bright comets that had their perihelion in 1957, the other being Comet Arend–Roland . Its peak magnitude was estimated to be around 1 [2] and it has been cha

#7 Comet Encke

Comet Encke / ˈ ɛ ŋ k i / , or Encke's Comet (official designation: 2P/Encke ), is a periodic comet that completes an orbit of the Sun once every 3.3 years. (This is the shortest period of a reasonably bright comet; the faint main-belt comet 311P/PanSTARRS has a period of 3.2 years.) Encke was first


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Galaxy / Galaxy


#1 NGC 7001

NGC 7001 is an intermediate spiral galaxy [2] located about 300 million light-years away [2] in the constellation Aquarius . [3] NGC 7001 has an estimated diameter of 106,000 light-years. [2] It was discovered by English astronomer John Herschel on July 21, 1827 and was also observed by Austrian ast

#2 NGC 2997

NGC 2997 is a face-on unbarred spiral galaxy about 40 [3]   million light-years away in the faint southern constellation of Antlia . [3] It was discovered March 4, 1793 by German-born astronomer William Herschel . J. L. E. Dreyer described it as, "a remarkable object, very faint, very large, very gr


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Institution / Institution


#1 Château de Meudon

Meudon Castle , also known as the Royal Castle of Meudon or Imperial Palace of Meudon, is a French castle located in Meudon in the Hauts-de-Seine department . At the edge of a wooded plateau, the castle offers views of Paris and the Seine , as well as of the Chalais valley. Located between Paris and

#2 Thomas King Observatory

The Thomas King Observatory stands at the top of the Botanic Garden in Wellington , New Zealand , as part of the Carter Observatory . In the past it has housed research, preservation of heritage, education and promotion of astronomy to the public. Carter Observatory - Thomas King Observatory Carter

#3 Thirty Meter Telescope protests

The Thirty Meter Telescope protests are a series of protests and demonstrations that began on the Island of Hawaii over the choosing of Mauna Kea for the site location of the Thirty Meter Telescope . Mauna Kea is the most sacred dormant volcano of Native Hawaiian religion and culture, and was known

#4 Camille Flammarion Observatory

The observatory was established in Juvisy-sur-Orge in 1883 by the French astronomer and author Camille Flammarion . In March 2010, the structure was classified as a historical monument by the French Ministry of Culture . The observatory belongs to the Société astronomique de France . Observatory Cam

#5 Astronomical Observatory of Mallorca

The Astronomical Observatory of Mallorca ( Spanish : Observatorio Astronómico de Mallorca , OAM ) is an observatory just south of Costitx , Mallorca , Spain . [3] Observatory Astronomical Observatory of Mallorca Alternative   names ca Observatory   code 620   Location Costitx , Mallorca , Spain Coor

#6 Thirty Meter Telescope

The Thirty Meter Telescope ( TMT ) is a planned extremely large telescope (ELT) [5] [6] that has become controversial due to its location on Mauna Kea , [7] [8] [9] [10] on the island of Hawaiʻi . The TMT would become the largest visible-light telescope on Mauna Kea. [11] [12] Future observatory in

#7 Deep Underground Neutrino Experiment

The Deep Underground Neutrino Experiment ( DUNE ) is a neutrino experiment under construction, with a near detector at Fermilab and a far detector at the Sanford Underground Research Facility that will observe neutrinos produced at Fermilab . An intense beam of trillions of neutrinos from the produc

#8 Lowell Observatory

Lowell Observatory is an astronomical observatory in Flagstaff, Arizona , United States . Lowell Observatory was established in 1894, placing it among the oldest observatories in the United States, and was designated a National Historic Landmark in 1965. [2] [3] In 2011, the Observatory was named on

#9 Network for Astronomy School Education

Network for Astronomy School Education (NASE) is an International Astronomical Union (IAU) Working Group that works on Training Teachers for primary and secondary schools. In 2007, professor George K. Miley , IAU vice-president, invited Rosa M. Ros to begin exploring the idea of setting up an astron

#10 Union Observatory

Union Observatory also known as Johannesburg Observatory ( 078 ) is a defunct astronomical observatory in Johannesburg , South Africa that was operated between 1903 and 1971. It is located on Observatory Ridge , the city's highest point at 1,808 metres altitude in the suburb Observatory . [1] [2] De

#11 Brera Astronomical Observatory

The Brera Observatory ( Italian : Osservatorio Astronomico di Brera ) is an astronomical observatory in the Brera district of Milan , Italy. It was built in the historic Palazzo Brera in 1764 by the Jesuit astronomer Roger Boscovich . [1] Following the suppression of the Jesuits by Clement XIV on 21

#12 University of California High-Performance AstroComputing Center

The University of California High-Performance AstroComputing Center ( UC-HiPACC ), based at the University of California at Santa Cruz (UCSC), is a consortium of nine University of California campuses and three Department of Energy laboratories ( Lawrence Berkeley National Laboratory , Lawrence Live

#13 Črni Vrh Observatory

The Črni Vrh Observatory ( Slovene : Observatorij Črni Vrh , IAU code : 106 ) is an astronomical observatory located in western Slovenia , close to the settlement of Črni Vrh , near the town of Idrija . The current observatory was built in 1985 and stands at an elevation of 730 metres (2,400   ft) .

#14 Campo Imperatore Near-Earth Object Survey

The CINEOS program ( Campo Imperatore Near-Earth Object Survey ), started in 2001, is dedicated to the discovery and follow-up of near-Earth objects (NEOs), namely asteroids and comets which periodically approach or intersect the Earth's orbit . In particular CINEOS is addressed to the discovery of

#15 Five College Radio Astronomy Observatory

The Five College Radio Astronomical Observatory ( FCRAO ) was a radio astronomy observatory located on a peninsula in the Quabbin Reservoir . It was sited in the town of New Salem, Massachusetts on land that was originally part of Prescott, Massachusetts . It was founded in 1969 by the Five College


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Meteorite / Meteorite


#1 Bunburra Rockhole (meteorite)

Bunburra Rockhole is an anomalous basaltic achondritic meteorite . [1] [2] [3] Originally classified as a eucrite , [3] it was thought to belong to a group of meteorites that originated from the asteroid 4 Vesta , [4] [5] [2] but has since been reclassified based on oxygen and chromium isotopic comp

#2 HAT-P-13c

HAT-P-13c is a substellar object orbiting the star HAT-P-13 located 698 light years away from Earth in the constellation of Ursa Major . A search for transits was negative, however only 72% of the possible transit configurations could be ruled out. [1] With a mass at least 15.2 times that of Jupiter

#3 HAT-P-13b

HAT-P-13b is an extrasolar planet approximately 700 light-years away in the constellation Ursa Major . The planet was discovered when it transited across its sun, HAT-P-13 . This planet is a hot Jupiter with 0.851 times the mass of Jupiter and 1.28 radius. The planet has a lower mass, but its overal


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Planet / Planet


#1 List of exoplanet search projects

The following is a list of exoplanet search projects . Parts of this article (those related to the number of exoplanets discovered) need to be updated . ( January 2022 )


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Researcher / Researcher


#1 Johann Philipp von Wurzelbauer

Johann Philipp von Wurzelbauer (also spelled Wurzelbaur , Wurzelbau , Wurtzelbaur , Wurtzelbau ) (28 September 1651 – 21 July 1725) was a German astronomer . This article includes a list of references , related reading or external links , but its sources remain unclear because it lacks inline citati

#2 Jan Muscenius

Jan Muscenius, (Jan Muszczeński alias Jan Mucha, 1532 – 21 July 1602) was a Polish astronomer , theologian, and the rector of Kraków Academy (now Jagiellonian University ). [1]

#3 Paul G. Comba

Paul G. Comba (1926 – April 5, 2017) was an Italian-American computer scientist , an amateur astronomer and a prolific discoverer of minor planets . [2] Paul G. Comba Born 1926   ( 1926 ) Tunisia Died April 4, 2017 (2017-04-04) (aged   90–91) Education Ph.D. Alma   mater University of Turin , Blufft

#4 Freimut Börngen

Freimut Börngen ( German: [ˈfʁaɪmuːt ˈbœʁŋən] ; 17 October 1930 – 19 June 2021) was a German astronomer and a prolific discoverer of minor planets . [2] A few sources give his first name wrongly as "Freimuth". The Minor Planet Center credits him as F. Borngen . German astronomer (1930–2021) Minor pl

#5 Anton Staus

Anton Staus (5 September 1872 – 21 July 1955) was a German astronomer . German astronomer Asteroids discovered: 1   [1] 335 Roberta 1 September 1892 As a young man, he discovered the inner main-belt asteroid 335 Roberta at Heidelberg Observatory in 1892. [2] It was the 12th asteroid that was discove

#6 Brett J. Gladman

Brett James Gladman (born April 19, 1966) [2] [3] is a Canadian astronomer and a full professor at the University of British Columbia 's Department of Physics and Astronomy in Vancouver , British Columbia . He holds the Canada Research Chair in planetary astronomy . [4] He does both theoretical work

#7 Milan Rastislav Štefánik

Milan Rastislav Štefánik ( Slovak pronunciation:   [ˈmilan ˈrascislaw ˈʂcefaːɲik] ( listen ) ; 21 July 1880 – 4 May 1919) was a Slovak politician, diplomat, aviator and astronomer. During World War I , he served at the same time as a general in the French Army and as Minister of War for Czechoslovak

#8 Lenka Kotková

Lenka Kotková ( née Šarounová ; born 26 July 1973) is a Czech astronomer and a discoverer of minor planets . Czech astronomer, asteroid discoverer Lenka Kotková ( née Šarounová) Lenka Kotková at the Ondřejov Observatory Born ( 1973-07-26 ) 26 July 1973 (age   48) Dobřichovice , Czechoslovakia Nation

#9 Joan Feynman

Joan Feynman (March 31, 1927 – July 21, 2020) was an American astrophysicist . She made contributions to the study of solar wind particles and fields, sun-Earth relations, and magnetospheric physics. In particular, Feynman was known for developing an understanding of the origin of auroras . She was

#10 Guinevere Kauffmann

Guinevere Alice Mei-Ing Kauffmann was born in California. She is an astrophysicist and is known for her work studying galaxies among other subjects. American astrophysicist This biography of a living person needs additional citations for verification . ( March 2013 ) Guinevere Kauffmann Born 1968 Ca

#11 Antonín Mrkos

Antonín Mrkos ( Czech pronunciation: [ˈantoɲiːn ˈmr̩kos] ) (27 January 1918, Střemchoví – 29 May 1996, Prague ) was a Czech astronomer . Czech astronomer Antonín Mrkos Minor planets discovered: 274   [1] see §   List of discovered minor planets

#12 Robert Simpson Woodward

Robert Simpson Woodward (July 21, 1849 – June 29, 1924) was an American civil engineer , physicist and mathematician . American mathematician This article includes a list of general references , but it lacks sufficient corresponding inline citations . ( March 2013 ) Robert S. Woodward The Robert Sim

#13 Franck Marchis

Franck Marchis (born April 6, 1973 in Caen , France), astronomer and planetary scientist , is best known for his discovery and characterization of multiple asteroids, his study of Io volcanism and imaging of exoplanets, planets around other stars. American astronomer This article includes a list of

#14 Philip Fox (astronomer)

Philip Fox (March 7, 1878 – July 21, 1944) was an American astronomer and an officer in the U.S. Army . He was the first director of the Adler Planetarium in Chicago , the first planetarium in the western hemisphere. Philip Fox Fox at the Fourth Conference International Union for Cooperation in Sola

#15 Jana Tichá

Jana Tichá (born 1965 in České Budějovice ) is a Czech astronomer and discoverer of minor planets . She studied at the University of Economics in Prague and graduated in 1987. In 1992 she was selected for the position of a director of the Kleť Observatory . Czech astronomer Jana Tichá with her ex-hu

#16 Matthew J. Holman

Matthew J. Holman (born 1967) is a Smithsonian astrophysicist and lecturer at Harvard University . Holman studied at MIT , where he received his bachelor's degree in mathematics in 1989 and his PhD in planetary science in 1994. He was awarded the Newcomb Cleveland Prize in 1998. [1] Smithsonian astr

#17 Robert H. McNaught

Robert H. McNaught (born in Scotland in 1956) is a Scottish-Australian astronomer at the Research School of Astronomy and Astrophysics of the Australian National University (ANU). He has collaborated with David J. Asher of the Armagh Observatory . Scottish-Australian astronomer (born 1956) Minor pla

#18 John Broughton

John Broughton (born 1952) [2] is an Australian amateur astronomer and artist. He is among the most prolific discoverers of minor planets worldwide, credited by the Minor Planet Center with more than a thousand discoveries made between 1997 and 2008. [1] His observations are done at Reedy Creek Obse

#19 Cyril Jackson (astronomer)

Cyril V. Jackson (5 December 1903 – February 1988) was a South African astronomer , known for discovering 72 asteroids and a number of comets. South African astronomer Asteroids discovered: 72 1116 Catriona 5 April 1929 1186 Turnera 1 August 1929 1193 Africa 24 April 1931 1194 Aletta 13 May 1931 119

#20 Harry Edwin Wood

Harry Edwin Wood (3 February 1881 – 27 February 1946) was an English astronomer , director of the Union Observatory in Johannesburg , and discoverer of minor planets . [2] [3] Asteroids discovered: 12   [1] 715 Transvaalia 22 April 1911 list 758 Mancunia 18 May 1912 list 790 Pretoria 16 January 1912


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Star / Star


#1 Alpha Andromedae

Alpha Andromedae ( α Andromedae , abbreviated Alpha And or α And ), officially named Alpheratz / æ l ˈ f ɪər æ t s / , [12] [13] is 97 light-years from the Sun and is the brightest star in the constellation of Andromeda when Beta Andromedae undergoes its periodical dimming. Immediately northeast of

#2 Sagittarius A*

Sagittarius A* ( / ˈ eɪ s t ɑːr / AY star ), abbreviated Sgr   A* ( / ˈ s æ dʒ ˈ eɪ s t ɑːr / SAJ AY star [3] ) is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way . It is located near the border of the constellations Sagittarius and Scorpius , about 5.6° south of the


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