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langs: 26 апреля [ru] / april 26 [en] / 26. april [de] / 26 avril [fr] / 26 aprile [it] / 26 de abril [es]

days: april 23 / april 24 / april 25 / april 26 / april 27 / april 28 / april 29

Asteroid / Asteroid


#1 7066 Nessus

7066 Nessus / ˈ n ɛ s ə s / is a very red centaur on an eccentric orbit, located beyond Saturn in the outer Solar System . It was discovered on 26 April 1993, by astronomers of the Spacewatch program at the Kitt Peak National Observatory in Tucson, Arizona . [1] The dark and reddish minor planet is

#2 2004 HR56

2004 HR 56 , is a micro- asteroid , classified as near-Earth object belonging to the Apollo group . It was first observed by Spacewatch at Kitt Peak National Observatory on 25 April 2004. [3] 2004 HR 56 Orbital diagram of asteroid 2004 HR 56 as of 25 April 2004 Discovery [1] Discovered   by Spacewat

#3 (469987) 2006 HJ123

2006 HJ 123 (also written 2006 HJ123 ) is a trans-Neptunian object (TNO). It was discovered in 2006 by Marc W. Buie . The object is a plutino (in 2:3 resonance with Neptune). [2] (469987) 2006 HJ 123 Discovery [1] Discovered   by Marc W. Buie Discovery   date 27 April 2006 Designations Alternative d

#4 2017 XO2

2017 XO 2 , also written 2017 XO2 , is a sub-kilometer asteroid and near-Earth object of the Apollo group approximately 110 meters (360 feet) in diameter. The asteroid was discovered by Pan-STARRS in December 2017, [1] after it already had approached Earth at 0.051   AU (7,600,000   km ) or 20 lunar

#5 83 Beatrix

Beatrix ( minor planet designation : 83 Beatrix ) is a fairly large asteroid orbiting in the inner part of the main asteroid belt . It was discovered by Annibale de Gasparis on April 26, 1865. It was his last asteroid discovery. A diameter of at least 68 kilometres (42   mi) was determined from the

#6 243 Ida

Ida , minor planet designation 243 Ida , is an asteroid in the Koronis family of the asteroid belt . It was discovered on 29 September 1884 by Austrian astronomer Johann Palisa at Vienna Observatory and named after a nymph from Greek mythology . Later telescopic observations categorized Ida as an S-

#7 2091 Sampo

2091 Sampo , provisional designation 1941 HO , is a stony Eos asteroid and relatively slow rotator from the outer region of the asteroid belt , approximately 30 kilometers in diameter. It was discovered on 26 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory , Finland, and named af

#8 8034 Akka

8034 Akka , provisional designation 1992 LR , is a sub-kilometer sized, eccentric asteroid and near-Earth object of the Apollo group , approximately 540 meters in diameter. It was discovered at Palomar Observatory in 1992, and named after Akka from Finnish mythology. 8034 Akka Discovery   [1] Discov

#9 (506479) 2003 HB57

(506479) 2003 HB 57 , is an extreme trans-Neptunian object of the extended scattered disc in the outermost region of the Solar System , approximately 180 kilometers in diameter. It was discovered by astronomers at the Mauna Kea Observatory on 26 April 2003. [4] (506479) 2003 HB 57 Discovery [1] Disc

#10 (394130) 2006 HY51

(394130) 2006 HY 51 is a near-Earth object of the Apollo asteroid group with a high orbital eccentricity , approximately 1.2 kilometers in diameter. It was discovered on 26 April 2006, by LINEAR at Lincoln Lab's ETS in Socorro, New Mexico, United States. [2] (394130) 2006 HY 51 Discovery [1] Discove

#11 756 Lilliana

756 Lilliana is a minor planet orbiting the Sun that was discovered by American astronomer Joel Hastings Metcalf on 26 April 1908 from Taunton, Massachusetts . It rotates around its axis of rotation every 9.36 hours. [5] [ clarification needed ] 756 Lilliana Discovery   [1] Discovered   by Joel Hast

#12 69230 Hermes

69230 Hermes is a sub-kilometer sized asteroid and binary system on an eccentric orbit, [10] classified as a potentially hazardous asteroid and near-Earth object of the Apollo group , that passed Earth at approximately twice the distance of the Moon on 30 October 1937. The asteroid was named after H

#13 236 Honoria

Honoria ( minor planet designation : 236 Honoria ) is a large main belt asteroid that was discovered by Austrian astronomer Johann Palisa on 26 April 1884 in Vienna . The asteroid was named after Honoria , granddaughter of the Roman Emperor Theodosius I , who started negotiations with Attila the Hun

#14 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

#15 Ilmarë

Ilmarë , [lower-alpha 2] or Varda I , full designation 174567 Varda I Ilmarë , is the single known natural satellite of the Kuiper Belt planetoid 174567 Varda . It was discovered by Keith Noll et al. in 2009, at a separation of about 0.12 arcsec, using discovery images taken by the Hubble Space Tele

#16 868 Lova

868 Lova ( prov. designation : A917 HB or 1917 BU ) is a large and dark background asteroid , approximately 51 kilometers (32 miles) in diameter, from the central regions of the asteroid belt . It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 26 April

#17 2006 HH123

2006 HH 123 , also written as 2006 HH123 , was a misidentified nonexistent object that had a short 1 day observation arc . It was formerly thought to be a lost object with an assumed eccentricity of 0.46. [4] If it had been a scattered-disc object it would have had an absolute magnitude of 5.2, [4]

#18 163 Erigone

163 Erigone is an asteroid from the asteroid belt and the namesake of the Erigone family of asteroids that share similar orbital elements and properties. It was discovered by French astronomer Henri Joseph Perrotin on April 26, 1876, and named after one of the two Erigones in Greek mythology . This

#19 (163132) 2002 CU11

(163132) 2002 CU 11 , provisional designation 2002 CU 11 , is a bright, sub-kilometer asteroid , classified as near-Earth object and potentially hazardous asteroid of the Apollo group . [2] Based on absolute magnitude , it is the second largest asteroid known to have passed closer than the Moon. [5]


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Comet / Comet


#1 40P/Väisälä

40P/Väisälä is a periodic comet that was discovered on February 8, 1939. Its orbit was determined on April 26, 1939. [3] In 1994, the diameter of its nucleus was found to be 4.2   km, similar in size to that of Comet Encke . [2] Periodic comet with 10 year orbit 40P/Väisälä Comet 40P/Väisälä from th

#2 45P/Honda–Mrkos–Pajdušáková

45P/Honda–Mrkos–Pajdušáková is a short-period comet discovered by Minoru Honda December 3, 1948. [8] It is named after Minoru Honda , Antonín Mrkos , and Ľudmila Pajdušáková . The object revolves around the Sun on an elliptical orbit with a period of 5.25 years. [1] The nucleus is 1.3 kilometers in


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Galaxy / Galaxy


#1 NGC 5774

NGC 5774 is an intermediate spiral galaxy approximately 71 million light-years away from Earth in the constellation of Virgo . [1] It was discovered by Irish engineer Bindon Stoney on April 26, 1851. [3] Intermediate spiral galaxy in the constellation Virgo NGC 5774 NGC 5774 ( NASA/ESA HST ) Observa

#2 NGC 3837

NGC 3837 is an elliptical galaxy located about 290 million light-years away [2] in the constellation Leo . [3] It was discovered by astronomer William Herschel on April 26, 1785. [4] NGC 3837 is a member of the Leo Cluster . [5] [6] [4] Elliptical galaxy in the constellation Leo NGC 3837 SDSS image

#3 NGC 3972

NGC 3972 is a spiral galaxy located in the northern constellation of Ursa Major . It was discovered by William Herschel on April 14, 1789. [7] This galaxy is located 66   million light years away and is receding with a heliocentric radial velocity of 846   km/s . [2] It is a member of the NGC 3992 G

#4 NGC 4098

NGC 4098 is an interacting [2] pair of spiral galaxies [2] [3] located 330 million light-years away [3] in the constellation Coma Berenices . [4] NGC 4098 was discovered by astronomer William Herschel on April 26, 1785. It was then rediscovered by Hershel on December 27, 1786 was listed as NGC 4099.

#5 NGC 4084

NGC 4084 is an elliptical galaxy [3] located 315 million light-years away [4] in the constellation Coma Berenices . [5] NGC 4084 was discovered by astronomer Heinrich d'Arrest on April 26, 1865. [6] NGC 4084 is an isolated member of the Coma Supercluster [7] and is classified as a LINER galaxy . [8]

#6 NGC 4095

NGC 4095 is an elliptical galaxy located 330 million light-years away [2] in the constellation Coma Berenices . [3] The galaxy was discovered by astronomer William Herschel on April 26, 1785. [4] NGC 4095 is a member of the NGC 4065 Group [5] [6] [7] [8] and is a LINER . [9] Elliptical galaxy in the

#7 NGC 3821

NGC 3821 is a low surface brightness [2] spiral galaxy [3] and a ring galaxy [4] about 270 million light-years away [3] in the constellation Leo . [5] The galaxy was discovered by astronomer William Herschel on April 26, 1785 [6] and is a member of the Leo Cluster . [7] Spiral galaxy in the constell


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Institution / Institution


#1 Stratospheric Observatory for Infrared Astronomy

The Stratospheric Observatory for Infrared Astronomy ( SOFIA ) was an 80/20 joint project of NASA and the German Aerospace Center (DLR) [1] to construct and maintain an airborne observatory . NASA awarded the contract for the development of the aircraft, operation of the observatory and management o

#2 Ondřejov Observatory

The Ondřejov Observatory ( pronounced [ˈondr̝ɛjof] ; Czech : Observatoř Ondřejov ) is the principal observatory of the Astronomical Institute ( Astronomický ústav ) of the Academy of Sciences of the Czech Republic . It is located near the village of Ondřejov , 35 kilometres (22 miles) southeast of P

#3 Extremely Large Telescope

The Extremely Large Telescope ( ELT ) is an astronomical observatory currently under construction. When completed, it is planned to be the world's largest optical / near-infrared extremely large telescope . Part of the European Southern Observatory (ESO) agency, it is located on top of Cerro Armazon

#4 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

#5 Cerro Armazones Observatory

Cerro Armazones Observatory (Spanish: Observatorio Cerro Armazones, OCA; German: Observatorium Cerro Armazones, OCA) was an astronomical observatory owned and operated jointly by the Ruhr University Bochum (RUB) and the Catholic University of the North (UCN). It was established in 1995 on the slopes

#6 European Southern Observatory

The European Organisation for Astronomical Research in the Southern Hemisphere , [2] commonly referred to as the European Southern Observatory ( ESO ), is an intergovernmental research organisation made up of 16 member states for ground-based astronomy . Created in 1962, ESO has provided astronomers

#7 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

#8 Low-Frequency Array (LOFAR)

The Low-Frequency Array , or LOFAR , is a large radio telescope , with an antenna network located mainly in the Netherlands, and spreading across 7 other European countries as of 2019. Originally designed and built by ASTRON , the Netherlands Institute for Radio Astronomy, it was first opened by que

#9 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


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Meteorite / Meteorite


#1 Angers (meteorite)

Angers is an L6 meteorite that hit Pays de la Loire , France in 1822. [2] The meteor struck at 8:15 PM on 3 June. [3] It has since been stored along with L'Aigle , another meteorite that struck France 19 years earlier, on 26 April 1803, in a room at the Muséum d’histoire naturelle d’Angers , a Frenc

#2 HD 191806 b

HD 191806 b is an exoplanet orbiting HD 191806 , a K-type star . It has a minimum mass 8.52 times that of Jupiter . It does not orbit within the habitable zone . [1] In 2022, the inclination and true mass of HD 191806 b were measured via astrometry . [2] HD 191806 b Discovery Discovered   by R. F. D

#3 L'Aigle (meteorite)

L'Aigle is a L6 meteorite that fell on 26 April 1803 in Lower Normandy , France . Meteorite that fell in Normandy, France in April 1803 L'Aigle L'Aigle meteorite Type Chondrite Class Ordinary chondrite Group L6 Country France Region Normandy Coordinates 48°46′N 0°38′E [1] Observed fall Yes Fall date


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Researcher / Researcher


#1 Wilbur Norman Christiansen

Wilbur Norman "Chris" Christiansen (9 August 1913 in Melbourne , Victoria – 26 April 2007 in Dorrigo , New South Wales ) was a pioneer Australian radio astronomer and electrical engineer . Christiansen at the International Union of Radio Science conference, Sydney 1952 He grew up in Elsternwick, Vic

#2 Max Wolf

Maximilian Franz Joseph Cornelius Wolf (21 June 1863 – 3 October 1932) was a German astronomer and a pioneer in the field of astrophotography . He was the chairman of astronomy at the University of Heidelberg and director of the Heidelberg-Königstuhl State Observatory from 1902 until his death in 19

#3 Harlow Shapley

Harlow Shapley (November 2, 1885 – October 20, 1972) was an American scientist, head of the Harvard College Observatory (1921–1952), and political activist during the latter New Deal and Fair Deal . [1] [2] American scientist and political activist (1885–1972) Harlow Shapley Born November 2, 1885 Na

#4 Walter Ferreri

Walter Ferreri (born 1948), originally from Buddusò in Sardinia, is an astronomer at the Italian Osservatorio Astronomico di Torino , science writer and discoverer of minor planets. Minor planets discovered: 15   [1] 3625 Fracastoro 27 April 1984 list 3778 Regge 26 April 1984 list 4061 Martelli 19 M

#5 Eugene Merle Shoemaker

Eugene Merle Shoemaker (April 28, 1928   – July 18, 1997) was an American geologist . He co-discovered Comet Shoemaker–Levy 9 with his wife Carolyn S. Shoemaker and David H. Levy . This comet hit Jupiter in July 1994: the impact was televised around the world. Shoemaker also studied terrestrial crat

#6 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

#7 William Sadler Franks

William Sadler Franks (26 April 1851 in Newark, Nottinghamshire – 19 June 1935 in East Grinstead [1] ) was a British astronomer . [2] [3] [4] British astronomer Franks was elected to the Royal Astronomical Society on 9 January 1880. [5] From 1890 to 1894 he directed the British Astronomical Associat

#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 Mary Rosse

The Rt Hon. Mary Parsons, Countess of Rosse ( née Mary Field) (14 April 1813 – 1885), was a British Irish amateur astronomer , architect, furniture designer, and pioneering photographer. Often known simply as Mary Rosse , she was one of the early practitioners of making photographs from waxed-paper

#10 Filippo Salviati

Filippo Vincenzo Romolo Salviati (29 January 1583 ( Florence ) – 22 March 1614 ( Barcelona )) was an Italian nobleman, scientist and friend of Galileo . [1] He is remembered today mainly because he appears as one of the figures in Galileo's controversial work the Dialogue Concerning the Two Chief Wo

#11 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

#12 Christopher Wren

Sir Christopher Wren PRS FRS ( / r ɛ n / ; [2] 30 October 1632 [ O.S. 20 October ] – 8 March 1723 [ O.S. 25 February ]) [3] [4] was one of the most highly acclaimed English architects in history, as well as an anatomist , astronomer , geometer , and mathematician- physicist . [4] He was accorded res

#13 Jean Fernel

Jean François Fernel ( Latinized as Ioannes Fernelius ; 1497 – 26 April 1558) [2] [3] was a French physician who introduced the term " physiology " to describe the study of the body's function. [4] He was the first person to describe the spinal canal . The lunar crater Fernelius is named after him.

#14 Karel van der Hucht

Karel van der Hucht (born 16 January 1946) is a Dutch astronomer . Dutch astronomer (born 1946) This article needs additional citations for verification . ( June 2022 ) Karel van der Hucht Karel van der Hucht in July 2007 Born Karel Albertus van der Hucht ( 1946-01-16 ) 16 January 1946 (age   76) Nu

#15 Aleksandr Aleksandrovich Mikhailov

Aleksandr Aleksandrovich Mikhailov (April 26 (N.S. date, April 14 O.S.), 1888, Morshansk - September 29, 1983) was a Russian astronomer who was a member of the Soviet Academy of Sciences. He worked at Pulkovo Observatory from 1947 to 1982. He was its director until 1964 and is credited with leading

#16 Karen Jean Meech

Karen J. Meech (born 1959) is an American planetary astronomer at the Institute for Astronomy (IfA) of the University of Hawaii . [2] American astronomer Minor planets discovered: 9   [1] see §   List of discovered minor planets

#17 Gustav Niessl von Mayendorf

Gustav Niessl von Mayendorf (26 April 1839 in Verona – 1 September 1919 in Hütteldorf , Vienna; often cited as G. von Niessl), was an Austrian astronomer and mycologist . [1] Austrian astronomer and mycologist (1839–1919) "Niessl" redirects here. For the Austrian politician, see Hans Niessl . Niessl

#18 Paul Wiegert

Paul Arnold Wiegert (born 1967) is a Canadian astronomer , discoverer of minor planets and professor at the University of Western Ontario . [2] Canadian astronomer Minor planets discovered: 85   [1] see §   List of discovered minor planets Wiegert studies unusual orbits of both observed objects and

#19 Krisztián Sárneczky

Krisztián Sárneczky (born 6 November 1974 in Budapest ) is a Hungarian teacher of geography [1] and prolific discoverer of minor planets and supernovae , researching at Konkoly Observatory in Budapest, Hungary. He is a board member of the Hungarian Astronomical Association (HAA) [2] and member of th

#20 Joel Hastings Metcalf

Joel Hastings Metcalf (January 4, 1866 – February 23, 1925) was an American astronomer , humanitarian and minister . [2] Asteroids discovered: 41   [1] 525 Adelaide October 21, 1908 581 Tauntonia December 24, 1905 599 Luisa April 25, 1906 600 Musa June 14, 1906 602 Marianna February 16, 1906 603 Tim


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Science / Science


#1 Cosmology

Cosmology ( from Ancient Greek κόσμος ( kósmos )   'world', and -λογία ( -logía )   'study of' ) is a branch of physics and metaphysics dealing with the nature of the universe. The term cosmology was first used in English in 1656 in Thomas Blount 's Glossographia , [2] and in 1731 taken up in Latin

#2 Great Debate (astronomy)

The Great Debate , also called the Shapley–Curtis Debate , was held on 26 April 1920 at the Smithsonian Museum of Natural History , between the astronomers Harlow Shapley and Heber Curtis . It concerned the nature of so-called spiral nebulae and the size of the universe . Shapley believed that these


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Star / Star


#1 SN 1998bw

SN 1998bw was a rare broad-lined Type Ic [1] gamma ray burst supernova detected on 26 April 1998 in the ESO 184-G82 spiral galaxy , which some astronomers believe may be an example of a collapsar ( hypernova ). [2] The supernova has been linked to GRB 980425 , which was detected on 25 April 1998, th

#2 SN 2011by

SN 2011by was a supernova in NGC 3972 . It was a type Ia supernova , discovered by Zhangwei Jin and Xing Gao (China). SN 2011by is about 5.3" east and 19.1" north of the center of NGC 3972. [1] [2] SN 2011by Image from Richie Jarvis Event type Supernova   Type Ia [1] Date April 26, 2011 ( UTC ) Cons


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