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langs: 7 апреля [ru] / april 7 [en] / 7. april [de] / 7 avril [fr] / 7 aprile [it] / 7 de abril [es]

days: april 4 / april 5 / april 6 / april 7 / april 8 / april 9 / april 10

Asteroid / Asteroid


#1 2021 AV7

2021 AV 7 is a near-Earth asteroid of the Apollo group , discovered by astronomers Alain Maury and G. Attard at San Pedro de Atacama , Chile on 15 January 2021. With an estimated diameter of 450–1,000   m (1,480–3,280   ft) , it is considered a potentially hazardous asteroid . It has a highly ellipt

#2 (5604) 1992 FE

(5604) 1992 FE is an Aten-type near-Earth minor planet . It was discovered by Robert H. McNaught at the Siding Spring Observatory in Canberra , Australia, on March 26, 1992. The asteroid is 550 meters (1,800   ft) in diameter. [1] (5604) 1992 FE Discovery [1] Discovered   by R. H. McNaught Discovery

#3 7604 Kridsadaporn

7604 Kridsadaporn , provisional designation 1995 QY 2 , is an unusual, carbonaceous asteroid and Mars-crosser on a highly eccentric orbit from the outer regions of the asteroid belt , approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 31 August 1995, by Australian astronomer R

#4 101955 Bennu

101955 Bennu (provisional designation 1999 RQ 36 ) [9] is a carbonaceous asteroid in the Apollo group discovered by the LINEAR Project on 11 September 1999. It is a potentially hazardous object that is listed on the Sentry Risk Table and tied for the highest cumulative rating on the Palermo Technica

#5 215 Oenone

Oenone ( minor planet designation : 215 Oenone ) is a typical main belt asteroid . It was discovered by the Russian astronomer Viktor Knorre on April 7, 1880, in Germany , and was the second of his four asteroid discoveries. The asteroid is named after Oenone , a nymph in Greek mythology . [3] 215 O

#6 73 Klytia

Klytia ( minor planet designation : 73 Klytia ) is a main-belt asteroid . It was the second and last asteroid discovery by the prolific comet discoverer Horace Tuttle , on April 7, 1862. It is named after Clytia , who loved Helios in Greek mythology . Of the first one hundred numbered asteroids , Kl

#7 791 Ani

791 Ani ( prov. designation : A914 MB or 1914 UV ) is a very large asteroid of the Meliboea family , located in the outer regions of the asteroid belt . It was discovered on 29 June 1914, by Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. [1] The dark carbonace

#8 Eris (dwarf planet)

Eris ( minor-planet designation 136199 Eris ) is the most massive and second-largest known dwarf planet in the Solar System . It is a trans-Neptunian object (TNO) in the scattered disk and has a high- eccentricity orbit. Eris was discovered in January 2005 by a Palomar Observatory –based team led by

#9 2278 Götz

2278 Götz , provisional designation 1953 GE , is a dark background asteroid from the inner regions of the asteroid belt 's background population , approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 7 April 1953, by German astronomer Karl Reinmuth at the Heidelberg Observatory

#10 2008 AO112

2008 AO 112 (also written 2008 AO112 ) is an Apollo near-Earth asteroid and potentially hazardous object . [2] It was discovered on 12 January 2008 by the Mount Lemmon Survey at an apparent magnitude of 21 using a 1.5-meter (59   in) reflecting telescope . [1] The asteroid was quickly lost and had a

#11 5535 Annefrank

5535 Annefrank ( / ˌ æ n ˈ f r æ ŋ k / ), provisional designation 1942 EM , is a stony Florian asteroid and suspected contact binary from the inner asteroid belt , approximately 4.5 kilometers in diameter. It was used as a target to practice the flyby technique that the Stardust space probe would la

#12 1660 Wood

1660 Wood , provisional designation 1953 GA , is a stony Phocaea asteroid from the inner regions of the asteroid belt , approximately 12 kilometers in diameter. It was named after British–South African astronomer Harry Edwin Wood . 1660 Wood Discovery [1] Discovered   by J. A. Bruwer Discovery   sit

#13 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

#14 2002 GB32

2002 GB 32 , is a trans-Neptunian object from the scattered disc in the outermost region of the Solar System , approximately 122 kilometers in diameter. [3] [4] It was first observed on 7 April 2002, by American astronomer Marc Buie at Cerro Tololo Observatory in Chile. [1] [2] 2002 GB 32 2002 GB 32

#15 Pluto

Pluto ( minor-planet designation : 134340 Pluto ) is a dwarf planet in the Kuiper belt , a ring of bodies beyond the orbit of Neptune . It is the ninth-largest and tenth-most- massive known object to directly orbit the Sun . It is the largest known trans-Neptunian object by volume, by a small margin


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Comet / Comet


#1 252P/LINEAR

Comet 252P/LINEAR is a periodic comet and near-Earth object discovered by the LINEAR survey on April 7, 2000. The comet is an Earth-Jupiter family comet, meaning that it passes quite close to both Earth and Jupiter . [2] This causes its orbit to be perturbed frequently on an astronomical timescale.

#2 Tempel 1

Tempel 1 (official designation: 9P/Tempel ) is a periodic Jupiter-family comet discovered by Wilhelm Tempel in 1867. It completes an orbit of the Sun every 5.5 years. Tempel 1 was the target of the Deep Impact space mission, which photographed a deliberate high-speed impact upon the comet in 2005. I

#3 Halley's Comet

Halley's Comet or Comet Halley , officially designated 1P/Halley , is a short-period comet visible from Earth every 75–79 years. [1] Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and thus the only naked-eye comet that can appear twice in a human l

#4 C/2015 G2 (MASTER)

C/2015 G2 (MASTER) is a comet discovered April 7, 2015 by MASTER, the Mobile Astronomical System of the Telescope-Robots at the South African Astronomical Observatory (SAAO). [1] It was the first comet discovered from South Africa in 35 years. [2] C/2015 G2 Discovery Discovery date 2015/04/07 Orbita

#5 81P/Wild

Comet 81P/Wild , also known as Wild 2 (pronounced "vilt two") ( / ˈ v ɪ l t / VILT ), is a comet named after Swiss astronomer Paul Wild , who discovered it on January 6, 1978, using a 40-cm Schmidt telescope at Zimmerwald , Switzerland. [5] Periodic comet with 6 year orbit 81P/Wild Comet Wild 2 (81P

#6 Comet Yi–SWAN

Comet C/2009 F6 (Yi–SWAN) is a non-periodic comet which appeared in March 2009. C/2009 F6 (Yi–SWAN) Discovery Discovered by Dae-am Yi, SWAN instrument on SOHO spacecraft Discovery date March 26, 2009 Orbital characteristics A Epoch 2009-May-22 Aphelion 904 AU [1] Perihelion 1.274072 AU Semi-major ax


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Galaxy / Galaxy


#1 HD1 (galaxy)

HD1 is a proposed high-redshift galaxy , and is considered, as of April 2022, to be one of the earliest and most distant known galaxies yet identified in the observable universe . The galaxy, with an estimated redshift of approximately z = 13.27, is seen as it was about 324 million years after the B

#2 NGC 5034

NGC 5034 is a spiral galaxy [4] in the constellation of Ursa Minor . NGC 5034 is its New General Catalogue designation. It is located about 401 million light-years (123 Mpc) from the Sun . [3] It was discovered on April 7, 1793, by William Herschel . [5] Spiral galaxy in the constellation Ursa Minor

#3 NGC 5364

NGC 5364 is a grand design spiral galaxy located 54.5 [2] million light years away in the constellation Virgo . It is inclined to the line of sight from the Earth at an angle of 47° along a position angle of 25°. [7] It is a member of the NGC 5364 Group of galaxies, itself one of the Virgo III Group


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Institution / Institution


#1 Air Force Maui Optical and Supercomputing observatory

The Air Force Maui Optical and Supercomputing observatory is an Air Force Research Laboratory (AFRL) operating location at Haleakala Observatory on Maui , Hawaii , with a twofold mission ( 608 ). First, it conducts the research and development mission on the Maui Space Surveillance System (MSSS) at

#2 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

#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 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

#5 Maragheh observatory

Maragheh observatory ( Persian : رصدخانه مراغه ) was an astronomical observatory established in 1259 CE under the patronage of the Ilkhanid Hulagu and the directorship of Nasir al-Din al-Tusi , a Persian scientist and astronomer . Located in the heights west of Maragheh , which is today situated in

#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 Belgrade Observatory

Belgrade Observatory is an astronomical observatory located in the eastern part of Belgrade , Serbia, in the natural environment of Zvezdara Forest . Observatory Belgrade Observatory Pavilion of Large Refractor Observatory   code 057   Location Belgrade , Serbia Coordinates 44°48′13″N 20°30′29″E Alt

#8 Purple Mountain Observatory

The Purple Mountain Observatory ( Chinese : 紫金山天文台 ; pinyin : Zǐjīnshān Tiānwéntái ), also known as Zijinshan Astronomical Observatory is an astronomical observatory located on the Purple Mountain in the east of Nanjing . [lower-alpha 1] Observatory Purple Mountain Observatory Purple Mountain Observ

#9 Berlin Observatory

The Berlin Observatory ( Berliner Sternwarte ) is a German astronomical institution with a series of observatories and related organizations in and around the city of Berlin in Germany , starting from the 18th century. It has its origins in 1700 when Gottfried Leibniz initiated the "Brandenburg Soci

#10 Kleť Observatory

Kleť Observatory ( Czech : Hvězdárna Kleť ; obs. code : 046 ) is an astronomical observatory in the Czech Republic . It is situated in South Bohemia , south of the summit of Mount Kleť , near the town of České Budějovice . Constructed in 1957, the observatory is at an altitude of 1,070 metres (3,510

#11 El Arenosillo

El Arenosillo Test Centre (CEDEA) is the name of a rocket launch site for suborbital rockets managed by INTA , located near Mazagón in Spain. [2] It is located in the province of Huelva , Andalucía , in the southwest coast of Spain (37.1° N, 6.7° W). [3] CEDEA is adjacent to the Center of Excellence

#12 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

#13 European Fireball Network

European Fireball Network is an international organization based in Central Europe ( Germany and Czech Republic ). Its purpose is systematic and simultaneous night observation of meteors and other nebular objects. European Fireball Network A network camera at Daun, Germany . The camera itself is loc

#14 Blue Hill Meteorological Observatory

The Blue Hill Meteorological Observatory in Milton, Massachusetts is the foremost structure associated with the history of weather observations in the United States. Located atop Great Blue Hill about 10 miles south of Boston , Massachusetts , it is home to the oldest continuous weather record in No

#15 Arecibo Telescope

The Arecibo Telescope was a 305   m (1,000   ft) spherical reflector radio telescope built into a natural sinkhole at the Arecibo Observatory located near Arecibo, Puerto Rico . A cable-mount steerable receiver and several radar transmitters for emitting signals were mounted 150   m (492   ft) above

#16 Long Wavelength Array

The Long Wavelength Array ( LWA ) is a radio telescope in central New Mexico . It began preliminary tests of the hardware in 2011, and began regular operations in late 2015. [1] It is one of the few observatories to utilize relatively low frequencies (10-88   MHz), and is used to study relativistic


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Meteorite / Meteorite


#1 Neuschwanstein (meteorite)

Neuschwanstein was an enstatite chondrite (type EL6) meteorite that fell to Earth on 6 April 2002 at 22:20:18 GMT near Neuschwanstein Castle , Bavaria, at the Germany–Austria border. Meteorite that fell to Earth on 6 April 2002 Neuschwanstein meteorite Neuschwanstein I fragment of the Neuschwanstein

#2 HD 205739 b

HD 205739 b is an extrasolar planet located approximately 350 light-years away Extrasolar planet in the constellation Piscis Austrinus HD 205739 b Discovery Discovered   by Lopez-Morales et al. Discovery   site Las Campanas Observatory Discovery   date September 5, 2008 Detection method Doppler spec

#3 WASP-13b

WASP-13b , also known as Cruinlagh , [5] is an extrasolar planet that was discovered in 2008 in the orbit of the sunlike star WASP-13 . [1] The planet has a mass of nearly half that of Jupiter, but a radius five-quarters of the size of Jupiter. This low relative mass might be caused by a core that i

#4 Příbram meteorite

The Příbram meteorite fell on 7 April 1959 east of Příbram , former Czechoslovakia (now the Czech Republic ). [1] Four pieces were found, the largest having a mass of 4.425 kilograms (9.76   lb) (near the village of Luhy, Dolní Hbity municipality). Příbram meteorite Pieces of Příbram and Morávka met


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Researcher / Researcher


#1 John Call Cook

John Call Cook (April 7, 1918 – October 12, 2012) was an American geophysicist who played a crucial role in establishing the field of ground-penetrating radar and is generally regarded as contributing the fundamental research to develop the field. [2] Cook is also known for demonstrating that aerial

#2 Robert E. Cox

Robert Edward Cox (March 12, 1917 – December 16, 1989) was an American optical engineer and a popularizer of amateur telescope making . He conducted the popular "Gleanings for ATMs" (Amateur Telescope Makers) column in Sky and Telescope magazine for 21 years. For other people with the same name, see

#3 Snježana Kordić

Snježana Kordić ( pronounced   [sɲěʒana kôːrditɕ] ( listen ) ; born 29 October 1964) [1] is a Croatian linguist . [3] In addition to her work in syntax , she has written on sociolinguistics . [2] Kordić is known among non-specialists for numerous articles against the puristic and prescriptive langua

#4 Thierry Pauwels

Thierry Pauwels (born 22 July 1957, Ghent ) is a Belgian astronomer from the Royal Observatory of Belgium . [2] [3] Between 1996 and 2008 he discovered and co-discovered 146 minor planets . This makes him one of the top 100 minor planet discoverers. [1] Belgian astronomer Minor planetss discovered:

#5 Adriaan Wesselink

Adriaan Jan Wesselink (1909–1995) was a Dutch astronomer who worked successively in the Netherlands, South Africa and the United States. He specialised in observing and understanding the characteristics of stars, particularly variable stars . [1] [2] [3] [4] Dutch astronomer (1909–1995) Dr Adriaan J

#6 Satoru Otomo

Satoru Otomo ( 大友 哲 , Ōtomo Satoru, 19 December 1957, Mitaka ) is a Japanese dentist, amateur astronomer and a discoverer of minor planets . [2] Minor planets discovered: 148   [1] see §   List of discovered minor planets According to the Minor Planet Center , he is credited with the discovery of 14

#7 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

#8 Marc Buie

Marc William Buie ( / ˈ b uː i / ; born 1958) is an American astronomer and prolific discoverer of minor planets who works at the Southwest Research Institute in Boulder, Colorado in the Space Science Department. [1] Formerly he worked at the Lowell Observatory in Flagstaff, Arizona, and was the Sen

#9 Michel Ory

Michel Ory (born 18 April 1966) is a Swiss amateur astronomer and a prolific discoverer of minor planets and comets , [1] who was one of five winners of the 2009 Edgar Wilson Award for his discovery of 304P/Ory (P/2008 Q2 Ory), a periodic comet of the Jupiter family on 27 August 2008, [2] using a 24

#10 Struve family

The Struve family (pronounced [ˈʃtʁuvə] in German, [ˈstruvɪ] in Russian) were a Baltic German noble family of Eastphalian origin and originated in Magdeburg , the family produced five generations of astronomers from the 18th to 20th centuries. Members of the family were also prominent in chemistry ,

#11 Takeshi Urata

Takeshi Urata ( 浦田 武 , Urata Takeshi , 1947 – December 15, 2012) [2] was a Japanese astronomer . He was a prolific discoverer of asteroids , observing at Nihondaira Observatory . Japanese astronomer Minor planets discovered: 642   [1] see §   List of discovered minor planets In 1978 he became the fi

#12 Yoshisada Shimizu

Yoshisada Shimizu ( 清水 義定 , Shimizu Yoshisada , born 1943) is a Japanese amateur astronomer and a prolific discoverer of hundreds of asteroids since 1993. An orthopaedist by profession, he is also known as an astrophotographer . [1] [2] Japanese astronomer Minor planets discovered: 311   [1] see §  

#13 Michel Hénon

Michel Hénon ( French:   [enɔ̃] ; 23 July 1931, Paris – 7 April 2013, Nice ) was a French mathematician and astronomer . [1] He worked for a long time at the Nice Observatory . French mathematician and astronomer In astronomy, Hénon is well known for his contributions to stellar dynamics . In the la

#14 Richard E. Berendzen

Richard Earl Berendzen (born September 6, 1938) is an American scientist , professor , and former president of American University , specializing in astronomy. His resignation in 1990 came following formal charges of making indecent phone calls to households in the Fairfax area over the course of se

#15 Oddbjørn Engvold

Oddbjørn Engvold (born 7 April 1938) is a Norwegian astronomer. Norwegian astronomer Oddbjørn Engvold in 2003 He was born in Askim . His specialty is solar physics , and he was appointed as a professor at the University of Oslo in 1989. He was secretary general of the International Astronomical Unio

#16 Dušan Kalmančok

Dušan Kalmančok (born 1945) is a Slovak astronomer and co-discoverer of minor planets . [2] Slovak astronomer Minor planets discovered: 7   [1] 11118 Modra August 9, 1996 [1] MPC 15860 Siráň April 20, 1996 [1] MPC 24194 Paľuš December 8, 1999 [1] MPC 38238 Holíč July 18, 1999 [2] MPC 48934 Kočanová

#17 William Kwong Yu Yeung

William Kwong Yu Yeung (born 1960; also known simply as Bill Yeung ; Chinese : 楊光宇 ) is a Hong Kong -born, Canadian amateur astronomer with telescopes based in the United States . [2] [3] Astronomer noted for the discovery of over 2,000 minor planets Minor planets discovered: 2031   [1] see §   List

#18 Sandy Antunes

Alexander "Sandy" Antunes , (born 4 April, 1967 in Baltimore, Maryland ) is a Maryland -area astronomer, author, and role playing game designer . He graduated from Boston University in 1989 with a dual major in astronomy and physics, received a Masters in astronomy from Penn State in 1992, and recei

#19 Wolf Bickel

Wolf Bickel (born 6 July 1942, Bensberg ) is a German amateur astronomer and a prolific discoverer of asteroids , observing at his private Bergisch Gladbach Observatory , Germany. He is the most successful German discoverer of minor planets . [2] [3] German astronomer Minor planets discovered: 687  

#20 Takao Kobayashi

Takao Kobayashi ( 小林 隆男 , Kobayashi Takao , born 1961) is a Japanese amateur astronomer and an outstanding discoverer of minor planets who currently works at the Ōizumi Observatory . The asteroid 3500 Kobayashi is named after him. [2] Minor planets discovered: 2479   [1] see §   List of discovered m


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Star / Star


#1 SN 1998aq

SN 1998aq is a nearby supernova located in the intermediate spiral galaxy NGC 3982 , offset 18 ″ west and 7″ of the galactic nucleus. It was discovered April 13, 1998 by amateur astronomer Mark Armstrong [2] and was confirmed by fellow British amateur Ron Arbour; both members of the U.K. Supernova/N


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