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langs: 21 сентября [ru] / september 21 [en] / 21. september [de] / 21 septembre [fr] / 21 settembre [it] / 21 de septiembre [es]

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

Asteroid / Asteroid


#1 149 Medusa

Medusa ( minor planet designation : 149 Medusa ) is a bright-coloured, stony main-belt asteroid that was discovered by French astronomer J. Perrotin on September 21, 1875, and named after the Gorgon Medusa , a snake - haired monster in Greek mythology . It is orbiting the Sun at a distance of 2.17  

#2 (508869) 2002 VT130

(508869) 2002 VT 130 , provisional designation 2002 VT 130 , is a trans-Neptunian object and binary system from the classical Kuiper belt , located in the outermost region of the Solar System . It was discovered by American astronomer Marc Buie at Kitt Peak Observatory on 7 November 2002. [1] [2] Th

#3 1543 Bourgeois

1543 Bourgeois , provisional designation 1941 SJ , is a stony asteroid from the central asteroid belt 's background population , approximately 12 kilometers in diameter. It was discovered on 21 September 1941, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. [8] The astero

#4 47171 Lempo

47171 Lempo , or as a binary (47171) Lempo–Hiisi (also known as 1999 TC 36 ), is a trans-Neptunian object and trinary system from the Kuiper belt , located in the outermost regions of the Solar System . It was discovered on 1 October 1999, by American astronomers Eric Rubenstein and Louis-Gregory St

#5 1123 Shapleya

1123 Shapleya , provisional designation 1928 ST , is a stony Florian asteroid from the inner regions of the asteroid belt , approximately 11 kilometers in diameter. It was discovered on 21 September 1928, by Russian astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula. [13] It w

#6 269 Justitia

Justitia ( minor planet designation : 269 Justitia ) is a fairly sizeable main belt asteroid . 269 Justitia Discovery Discovered   by Johann Palisa Discovery   date 21 September 1887 Designations MPC   designation (269) Justitia Pronunciation / dʒ ʌ ˈ s t ɪ ʃ i ə / [1] Alternative designations A887

#7 693 Zerbinetta

693 Zerbinetta is a minor planet orbiting the Sun . It was discovered on 21 September 1909 by August Kopff in Heidelberg . [1] [2] It was named after a character in Richard Strauss ' opera Ariadne auf Naxos . 693 Zerbinetta Discovery Discovered   by August Kopff Discovery   site Heidelberg Discovery

#8 162173 Ryugu

162173 Ryugu , provisional designation 1999 JU 3 , is a near-Earth object and a potentially hazardous asteroid of the Apollo group . It measures approximately 900 metres (3,000   ft) in diameter and is a dark object of the rare spectral type Cb, [11] with qualities of both a C-type asteroid and a B-

#9 4177 Kohman

4177 Kohman , provisional designation 1987 SS 1 , is a resonant Griqua asteroid from the outermost regions of the asteroid belt , approximately 11 kilometers (6.8 miles) in diameter. It was discovered on 21 September 1987, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowe

#10 922 Schlutia

922 Schlutia ( prov. designation : A919 SJ or 1919 FW ) is a background asteroid from the central regions of the asteroid belt . It was discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 18 September 1919. [1] The asteroid with an unknown spectral type has a rotation peri

#11 1928 Summa

1928 Summa , provisional designation 1938 SO , is a stony asteroid from the inner regions of the asteroid belt , approximately 9 kilometers in diameter. 1928 Summa Discovery [1] Discovered   by Y. Väisälä Discovery   site Turku Obs. Discovery   date 21 September 1938 Designations MPC   designation (

#12 2035 Stearns

2035 Stearns , provisional designation 1973 SC , is a bright Hungaria asteroid and sizable Mars-crosser inside the inner regions of the asteroid belt , approximately 6 kilometers (3.7 miles) in diameter. It was discovered on 21 September 1973, by American astronomer James Gibson at the Leoncito Astr

#13 24101 Cassini

24101 Cassini , provisional designation 1999 VA 9 , is an eccentric background asteroid from the middle region of the asteroid belt , approximately 7 kilometers in diameter. It was discovered on 9 November 1999, by American amateur astronomer Charles Juels at the Fountain Hills Observatory ( 678 ) i

#14 458 Hercynia

Hercynia ( minor planet designation : 458 Hercynia ), provisional designation 1900 FK , is a background asteroid from the outer regions of the asteroid belt , approximately 38 kilometers in diameter. It was discovered on 21 September 1900, by astronomers Max Wolf and Arnold Schwassmann at the Heidel

#15 2011 SL25

2011 SL 25 , also written as 2011 SL25 , is an asteroid and Mars trojan candidate that shares the orbit of the planet Mars at its L 5 point. [2] 2011 SL 25 Discovery Discovered   by Alianza S4 Discovery   site Cerro Burek Discovery   date 21 September 2011 Designations MPC   designation 2011 SL 25 M

#16 672 Astarte

672 Astarte is a minor planet orbiting the Sun . Main-belt asteroid 672 Astarte Discovery Discovered   by August Kopff Discovery   site Heidelberg Discovery   date 21 September 1908 Designations MPC   designation (672) Astarte Pronunciation / ə ˈ s t ɑːr t iː / [1] Alternative designations 1908 DY O

#17 671 Carnegia

671 Carnegia is a minor planet orbiting the Sun . 671 Carnegia Discovery Discovered   by J. Palisa Discovery   site Vienna Discovery   date 21 September 1908 Designations MPC   designation (671) Carnegia Alternative designations 1908 DV Orbital characteristics [1] Epoch 31 July 2016 ( JD 2457600.5)

#18 5677 Aberdonia

5677 Aberdonia , provisional designation 1987 SQ 1 , is a stony Koronis asteroid from the outer region of the asteroid belt , approximately 8 kilometers in diameter. It was discovered on 21 September 1987, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona,

#19 478 Tergeste

Tergeste ( minor planet designation : 478 Tergeste ) is a rare-type stony asteroid [ clarification needed ] from the outer region of the asteroid belt , approximately 78 kilometers in diameter. It was discovered on 21 September 1901, by Italian astronomer Luigi Carnera at Heidelberg Observatory in s

#20 5771 Somerville

5771 Somerville , provisional designation 1987 ST 1 , is a carbonaceous Lixiaohua asteroid from the outer regions of the asteroid belt , approximately 26 kilometers in diameter. It was discovered on 21 September 1987, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Ob


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Comet / Comet


#1 Comet ISON

Comet ISON , formally known as C/2012 S1 , was a sungrazing comet from the Oort cloud which was discovered on 21 September 2012 by Vitaly Nevsky (Виталий Невский, Vitebsk , Belarus ) and Artyom Novichonok (Артём Новичонок, Kondopoga , Russia ). [4] Oort cloud comet C/2012 S1 (ISON) Comet ISON as cap

#2 58P/Jackson–Neujmin

58P/Jackson–Neujmin is a periodic comet in the Solar System with a current orbital period of 8.19 years. [2] [3] Periodic comet with 8 year orbit 58P/Jackson–Neujmin Discovery Discovered by Cyril Jackson at Union Observatory , South Africa and Grigory N. Neujmin at Simeis Observatory , Russia Discov

#3 169P/NEAT

169/NEAT is a periodic comet in the Solar System . It is the parent body of the alpha Capricornids meteor shower in Late July. 169/NEAT may be related to comet P/2003 T12 (SOHO). [3] It comes to perihelion (closest approach to the Sun) on 9 July 2022. [1] On 13 July 2022 it will pass 0.1395   AU (20

#4 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

#5 C/1807 R1

C/1807 R1 , also known as the Great Comet of 1807 , is a long-period comet . It was visible to naked-eye observers in the northern hemisphere from early September 1807 to late December, and is ranked among the great comets due to its exceptional brightness. Long-period comet C/1807 R1 The Great Come

#6 19P/Borrelly

Comet Borrelly / b ɒ ˈ r ɛ l i / or Borrelly's Comet (official designation: 19P/Borrelly ) is a periodic comet , which was visited by the spacecraft Deep Space 1 in 2001. The comet last came to perihelion (closest approach to the Sun) on February 1, 2022 [1] [8] and will next come to perihelion on D


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Galaxy / Galaxy


#1 NGC 687

NGC 687 is a lenticular galaxy located 220 million light-years away [2] in the constellation Andromeda . It was discovered by astronomer William Herschel on September 21, 1786 [3] and is a member of Abell 262 . [4] [5] [6] [7] Lenticular galaxy in constellation Andromeda NGC 687 Pan-STARRS image of

#2 NGC 532

NGC 532 is a spiral galaxy in the constellation Pisces . The galaxy is approximately 100 million light-years (30 Megaparsecs ) away from the Earth , and was discovered on September 21st 1786 by the German-British astronomer William Herschel . Spiral galaxy in the constellation Pisces NGC 532 SDSS im

#3 NGC 704

NGC 704 is a lenticular galaxy [3] [4] located 220 million light-years away [5] in the constellation Andromeda . The galaxy was discovered by astronomer William Herschel on September 21, 1786 [3] and is also a member of Abell 262 . [6] [7] [8] Lenticular galaxy in the constellation Andromeda NGC 704

#4 NGC 7095

NGC 7095 is a barred spiral galaxy located about 115 million light-years away [2] in the constellation of Octans . [3] NGC 7095 was discovered by astronomer John Herschel on September 21, 1837. [4] Barred spiral galaxy in the constellation Octans NGC 7095 2MASS image of NGC 7095 Observation data ( J

#5 IC 4970

IC 4970 is an unbarred lenticular galaxy of type SA0^- pec: in the constellation Pavo . It is 212   million light-years (65   Mpc ) from Earth and is interacting with the barred spiral galaxy NGC 6872 . [2] It was discovered on 21 September 1900 by American astronomer DeLisle Stewart . [3] Lenticula

#6 NGC 708

NGC 708 is an elliptical galaxy located 240 million light-years away [2] in the constellation Andromeda and was discovered by astronomer William Herschel on September 21, 1786. [3] It is classified as a cD galaxy [4] [5] and is the brightest member of Abell 262 . [6] [7] NGC 708 is a weak [8] FR I r

#7 NGC 703

NGC 703 is a lenticular galaxy located 240 million light-years away [2] in the constellation Andromeda . The galaxy was discovered by astronomer William Herschel on September 21, 1786 [3] and is also a member of Abell 262 . [4] [5] [6] [7] Lenticular galaxy in the constellation Andromeda NGC 703 Pan

#8 NGC 422

NGC 422 is an open cluster located in the constellation Tucana . It was discovered on September 21, 1835 by John Herschel . It was described by Dreyer as "very faint (in Nubecular Minor).", with Nubecular Minor being the Small Magellanic Cloud . It was also described by DeLisle Stewart as "only 3 ex

#9 NGC 705

NGC 705 is a lenticular galaxy located 240 million light-years away [2] in the constellation Andromeda . The galaxy was discovered by astronomer William Herschel on September 21, 1786 [3] and is also a member of Abell 262 . [4] [5] [6] [7] Lenticular galaxy in the constellation Andromeda NGC 705 Pan

#10 NGC 834

NGC 834 is a spiral galaxy located in the Andromeda constellation . It is estimated to be 160 million light-years away from the Milky Way galaxy and has a diameter of about 65,000 [ citation needed ] light-years. The object was discovered on September 21, 1786 by the astronomer William Herschel . [5


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Institution / Institution


#1 Višnjan Observatory

Višnjan Observatory ( Croatian : Zvjezdarnica Višnjan ; obs. code: 120 ) is an astronomical observatory located near the village of Višnjan in Croatia . It is headed by Korado Korlević , a prolific astronomer and discoverer of minor planets . In 2009, the Višnjan observatory moved to Tičan (at 45°17

#2 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

#3 Kamenskoe Plateau Observatory

Observatory "Kamenskoe Plateau" ( Russian: Каменское плато) is an astronomical observatory founded in 1947 at the Fesenkov Astrophysical Institute . In 1948, Gavriil Tikhov headed an independent institution - the astrobotany sector of the Academy of Sciences of the Kazakh SSR - and founded his own o

#4 List of solar eclipses visible from Russia

This list of solar eclipses visible from Russia enumerates the solar eclipses that have been seen and will be seen in Russia . Lists of solar eclipses Geometry of a total solar eclipse (not to scale) Solar eclipses in antiquity Solar eclipses in the Middle Ages Modern history 16th 17th 18th 19th 20t

#5 Andrushivka Astronomical Observatory

Andrushivka Astronomical Observatory ( Ukrainian : Андрушівська астрономічна обсерваторія ) is a private astronomical observatory in the town suburbs of Andrushivka , Zhytomyr Oblast , Ukraine . It was established in 2001. [2] The founder and director of the observatory is Yuri Ivashchenko . The obs

#6 British Astronomical Association

The British Astronomical Association ( BAA ) was formed in 1890 as a national body to support the UK's amateur astronomers . Association of amateur astronomers British Astronomical Association Abbreviation BAA Formation 1890 Legal status Non-profit company Purpose Amateur astronomy Location Tonbridg

#7 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

#8 Madras Observatory

The Madras Observatory was an astronomical observatory which had its origins in a private observatory set up by William Petrie in 1786 and later moved and managed by the British East India Company from 1792 in Madras (now known as Chennai ). The main purpose for establishing it was to assist in navi

#9 Pistoia Mountains Astronomical Observatory

The Pistoia Mountains Astronomical Observatory ( Italian : Osservatorio Astronomico della Montagna Pistoiese ; obs. code : 104 ), also known as the San Marcello Observatory and the Pian dei Termini Observatory ( Italian : Osservatorio di Pian dei Termini ), is an astronomical observatory in San Marc

#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 National Radio Astronomy Observatory

The National Radio Astronomy Observatory ( NRAO ) is a federally funded research and development center of the United States National Science Foundation operated under cooperative agreement by Associated Universities, Inc for the purpose of radio astronomy . NRAO designs, builds, and operates its ow

#12 Gekko Observatory

Gekko Tenmondai (月光天文台 "Moonlight Observatory") is an astronomical observatory located in the Shizuoka Prefecture , Japan . It was founded in 1957 and is owned by the International Foundation for Cultural Harmony . Between 1987 and 2000, the astronomers Yoshiaki Oshima and Tetsuo Kagawa discovered 1

#13 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

#14 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) .

#15 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

#16 International Astronautical Congress

Every year, the International Astronautical Federation with the support of the International Academy of Astronautics and the International Institute of Space Law (IISL), holds the International Astronautical Congress ( IAC ) which is hosted by one of the national society members of the IAF. Annual m

#17 Pises Observatory

Pises Observatory is an astronomical observatory at the Parc National des Cévennes in France . It is situated at 1300 m altitude and houses an optical telescope with a charge-coupled device used for asteroid surveys. Minor planets discovered: 41   [1] see §   List of discovered minor planets Observa


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Researcher / Researcher


#1 Izold Pustõlnik

Izold Pustõlnik (Изольд Бенционович Пустыльник, Izold Bentsionovich Pustylnik ; 17 March 1938 in Odessa , Ukrainian SSR – 2 May 2008 in Tartu , Estonia ) was an eminent Estonian astronomer [1] who authored numerous scientific publications and served as editor of the Central European Journal of Physi

#2 Kin Endate

Kin Endate ( 円館 金 , Endate Kin , born December 15, 1960) is a Japanese amateur astronomer who has discovered hundreds of asteroids, most of them in collaboration with Kazuro Watanabe , placing him among the most prolific discoverers of minor planets . [1] Minor planets discovered: 624   [1] 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 Rush Holt Jr.

Rush Dew Holt Jr. (born October 15, 1948) is an American scientist and politician who served as the U.S. representative for New Jersey's 12th congressional district from 1999 to 2015. He is a member of the Democratic Party and son of former West Virginia U.S. Senator Rush D. Holt Sr. He worked as a

#5 Dmitry Dubyago

Dmitry Ivanovich Dubyago ( Дмитрий Иванович Дубяго in Russian ) (September 21 ( N.S. October 3), 1849 – October 22, 1918) was a Russian astronomer and expert in theoretical astrophysics , astrometry , and gravimetry . A crater on the Moon is named after Dmitry Dubyago. [1] Russian astronomer This ar

#6 Eugène Joseph Delporte

Eugène Joseph Delporte (10 January 1882   – 19 October 1955) was a Belgian astronomer born in Genappe . [2] [3] Belgian astronomer Minor planets discovered: 66   [1] see §   List of discovered minor planets He discovered a total of sixty-six asteroids . Notable discoveries include 1221 Amor (which l

#7 Sylvain Arend

Sylvain Julien Victor Arend (6 August 1902 – 18 February 1992) was a Belgian astronomer born in Robelmont , Luxembourg province, Belgium . His main interest was astrometry . [2] Belgian astronomer Minor planets discovered: 51   [1] see §   List of discovered minor planets Together with Georges Rolan

#8 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:

#9 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

#10 Kazuro Watanabe

Kazurō Watanabe ( 渡辺 和郎 , Watanabe Kazurō , born May 1, 1955) is a Japanese amateur astronomer and prolific discoverer of minor planets . [2] He was born in Hokkaidō , Japan and is a member of the Astronomical Society of Japan as well as of the Oriental Astronomical Association . Japanese astronomer

#11 Stephen Demainbray

Stephen Charles Triboudet Demainbray (1710 – 20 February 1782) was an English natural scientist and astronomer , who was Superintendent (or King's Astronomer ) at the King's Observatory in Richmond, Surrey (now in London) from 1768 to 1782. English natural scientist and astronomer

#12 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

#13 Julena Steinheider Duncombe

Julena Steinheider Duncombe (1911–2003) was an American mathematician and astronomer. She was known for her work as a teacher at the Heart Mountain Relocation Center and as an astronomer at the United States Naval Observatory , where she made pioneering observations with the 6-inch transit circle ,

#14 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

#15 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

#16 William Wallace Campbell

William Wallace Campbell (April 11, 1862 – June 14, 1938) was an American astronomer , and director of Lick Observatory from 1901 to 1930. He specialized in spectroscopy . [1] [2] [3] He was the tenth president of the University of California from 1923 to 1930. American astronomer William Wallace Ca

#17 Christian Ludwig Ideler

Christian Ludwig Ideler (21 September 1766 – 10 August 1846) was a German chronologist and astronomer . German chronologist and astronomer "Ideler" redirects here. For the psychiatrist, see Karl Wilhelm Ideler . For the German philologist, see Julius Ludwig Ideler . For the moon crater, see Ideler (

#18 Jane Rigby (astrophysicist)

Jane Rebecca Rigby is an American astrophysicist who works at the Goddard Space Flight Center and is Operations Project Scientist at the James Webb Space Telescope . She was elected one of Nature's 10 Ones to Watch in 2021. American astrophysicist Jane Rebecca Rigby Nancy Grace Roman with Jane Rigby

#19 Jaume Nomen

Jaume Nomen Torres (also: Jaime Nomen ; born June 23, 1960 in Tortosa , Catalonia) is a Spanish oral and maxillofacial surgeon , amateur astronomer and discoverer of numerous minor planets . He is of Catalan origin and became publicly known for the discovery of the near-Earth asteroid 2012 DA 14 (la

#20 Antoni Przybylski

Antoni Przybylski (1913 — September 21, 1985), [1] [3] (Polish pronunciation [anˈtɔɲi   pʂɨˈbɨlskʲi] ), sometimes referred to as "Bill", [1] was a Polish-Australian astronomer best known for discovering Przybylski's Star . [4] Polish-Australian astronomer Antoni 'Bill' Przybylski Przybylski in the 1


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Star / Star


#1 CXOU J164710.2−455216

CXOU J164710.2−455216 is an anomalous X-ray pulsar in the massive galactic open cluster Westerlund 1 . It is the brightest X-ray source in the cluster, and was discovered in 2005 in observations made by the Chandra X-ray Observatory . [1] [2] The Westerlund 1 cluster is believed to have formed in a

#2 Tabby's Star

Tabby's Star (also known as Boyajian's Star and WTF Star , and designated KIC 8462852 in the Kepler Input Catalog ) is an F-type main-sequence star in the constellation Cygnus approximately 1,470 light-years (450 parsecs ) from Earth. Unusual light fluctuations of the star, including up to a 22% dim


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