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langs: 30 апреля [ru] / april 30 [en] / 30. april [de] / 30 avril [fr] / 30 aprile [it] / 30 de abril [es]

days: april 27 / april 28 / april 29 / april 30 / may 1 / may 2 / may 3

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 22577 Alfiuccio

22577 Alfiuccio , provisional designation 1998 HT 51 , is a stony Flora asteroid from the inner regions of the asteroid belt , approximately 2.4 kilometers in diameter. It was discovered on 30 April 1998, by the Lowell Observatory Near-Earth-Object Search at Anderson Mesa Station in Flagstaff, Arizo

#3 753 Tiflis

753 Tiflis is a minor planet orbiting the Sun . It was discovered 30 April 1913 by the Georgian–Russian astronomer Grigory N. Neujmin at Simeiz Observatory and was named after Georgia's capital city Tiflis (now called Tbilisi). The object is orbiting the Sun at a distance of 2.33   AU with a period

#4 2005 HC4

2005 HC 4 is the asteroid with the smallest known perihelion of any known object orbiting the Sun (except sungrazing comets ). Its extreme orbital eccentricity brings it to within 0.071   AU of the Sun (23% of Mercury 's perihelion) and takes it as far as 3.562   AU from the Sun (well beyond the orb

#5 1355 Magoeba

1355 Magoeba , provisional designation 1935 HE , is a Hungaria asteroid and a suspected binary system from the innermost regions of the asteroid belt , approximately 5 kilometers in diameter. It was discovered on 30 April 1935, by English-born, South African astronomer Cyril Jackson at the Johannesb

#6 2020 HA10

2020 HA 10 is a near-Earth object of the Atira group . 2020 HA 10 Discovery   [1] Discovered   by Mount Lemmon Survey Discovery   site Mount Lemmon Obs. Discovery   date 28 April 2020 (first observed only) Designations MPC   designation 2020 HA 10 Minor   planet category NEO   · Atira   [1] Orbital

#7 749 Malzovia

749 Malzovia ( prov. designation : A913 GD or 1913 RF ) is a stony background asteroid from the inner regions of the asteroid belt , approximately 11 kilometers (6.8 miles) in diameter. It was discovered on 5 April 1913, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean

#8 (516977) 2012 HZ84

(516977) 2012 HZ 84 , provisional designation 2012 HZ 84 , is a small trans-Neptunian object from the Kuiper belt located in the outermost region of the Solar System , approximately 74 kilometers (46 miles) in diameter. It was discovered on 17 April 2012, by a team of astronomers using one of the Ma

#9 752 Sulamitis

752 Sulamitis / s uː l ə ˈ m aɪ t ɪ s / is an asteroid from the inner regions of the asteroid belt , approximately 60 kilometers (37 miles) in diameter. It is the parent body of the Sulamitis family ( 408 ), [4] a small family of 300 known carbonaceous asteroids. [8] :   23   This asteroid is orbiti

#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

#11 (164121) 2003 YT1

(164121) 2003 YT 1 , provisional designation 2003 YT 1 , is a bright asteroid and synchronous binary system on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group , approximately 2 kilometers (1.2 miles) in diameter. It was discovered on 1

#12 1368 Numidia

1368 Numidia , provisional designation 1935 HD , is a stony background asteroid from the central regions of the asteroid belt , approximately 19 kilometers in diameter. It was discovered on 30 April 1935, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. [15] The as


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Comet / Comet


#1 171P/Spahr

171P/Spahr is a periodic comet in the Solar System . 171P/Spahr was recovered on 20–24 October 2011 at apparent magnitude 20.6 using the 2.0-metre (79   in) Faulkes Telescope South . [3] 171P/Spahr is peaked at about magnitude 18 in 2012. [4] Periodic comet with 6 year orbit 171P/Spahr Discovery Dis

#2 Great Comet of 1901

The Great Comet of 1901 , sometimes known as Comet Viscara , formally designated C/1901 G1 (and in the older nomenclature as 1901 I and 1901a ), was a comet which became bright in the spring of 1901. Visible exclusively (or almost exclusively) [2] from the southern hemisphere , it was discovered on


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Galaxy / Galaxy


#1 NGC 5566

NGC 5566 is a barred spiral galaxy in the constellation Virgo , which is approximately 65 million light years away from Earth . The galaxy is the biggest in the constellation Virgo, stretching nearly 150,000 light years in diameter. [4] The galaxy NGC 5566 was discovered on 30 April 1786 by the Germ

#2 NGC 4900

NGC 4900 is a barred spiral galaxy in the constellation Virgo . It was discovered by William Herschel on April 30, 1786. [3] It is a member of the NGC 4753 Group of galaxies, which is a member of the Virgo II Groups , a series of galaxies and galaxy clusters strung out from the southern edge of the

#3 Messier 110

Messier 110 , or M110 , also known as NGC 205 , is a dwarf elliptical galaxy that is a satellite of the Andromeda Galaxy in the Local Group . [9] Satellite galaxy of the Andromeda Galaxy Messier 110 [1] Dwarf elliptical galaxy Messier 110 in Andromeda Observation data ( J2000 epoch ) Constellation A

#4 NGC 4665

NGC 4665 , also catalogued as NGC 4624 and NGC 4664 , is a barred lenticular or spiral galaxy located in the constellation Virgo . It is a member of the Virgo II Groups , a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster . [4] It is located at a dis

#5 NGC 5050

NGC 5050 is a lenticular galaxy in the constellation Virgo . It was discovered by a German astronomer Albert Marth on April 30, 1864. [2] It is also known as CGCG 44-43, MCG 1-34-12, PGC 46138, UGC 8329. [1] Lenticular galaxy in the constellation Virgo NGC 5050 NGC5050 - SDSS DR14. Observation data


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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 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 Astronomical Society of Glasgow

The Astronomical Society of Glasgow ( ASG ) was founded in 1954 in Glasgow , Scotland , by amateur astronomers and is dedicated to promoting an interest in Astronomy . This article uses bare URLs , which are uninformative and vulnerable to link rot . ( August 2022 ) This article relies excessively 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 Santa Lucia Stroncone Astronomical Observatory

The Santa Lucia Stroncone Astronomical Observatory ( Italian : Osservatorio Astrometrico Santa Lucia Stroncone ) is an astronomical observatory located at 350 metres (1,150   ft) altitude in Stroncone , near the city of Terni , in Umbria , north central Italy. Minor planets discovered: 55   [1] see

#6 Caltech Submillimeter Observatory

The Caltech Submillimeter Observatory ( CSO ) was a 10.4-meter (34   ft) diameter submillimeter wavelength telescope situated alongside the 15-meter (49   ft) James Clerk Maxwell Telescope (JCMT) at Mauna Kea Observatories . It was engaged in submillimeter astronomy , of the terahertz radiation band

#7 Boonshoft Museum of Discovery

The Boonshoft Museum of Discovery is a children's museum , science and technology center and zoo in Dayton, Ohio , United States that focuses on science and natural history . Exhibits include an extensive natural history collection as well as maintaining a collection of live animals native to Ohio a

#8 Farpoint Observatory

Farpoint Observatory is an astronomical observatory owned and operated by the Northeast Kansas Amateur Astronomers' League , or NEKAAL . It is located on the grounds of Mission Valley High School at Eskridge , near Auburn, Kansas , approximately 30 miles (48   km) southwest of Topeka , Kansas , Unit

#9 Dearborn Observatory

The Dearborn Observatory is an astronomical observatory located on the Evanston campus of Northwestern University . The observatory was originally constructed in 1888, through an agreement between the university and the Chicago Astronomical Society. In the summer of 1939, Dearborn Observatory had to

#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 Ole Rømer Observatory

Ole Rømer Observatory ( Danish : Ole Rømer Observatoriet ) is an astronomical observatory and museum, built in 1911 and located in Aarhus , Denmark. It is operated by Aarhus University and functions both as a research and training laboratory for the university Institute for Physics and Astronomy and

#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 LIGO

The Laser Interferometer Gravitational-Wave Observatory ( LIGO ) is a large-scale physics experiment and observatory designed to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. [1] Two large observatories were built in the United States with

#14 List of solar eclipses visible from Ukraine

This list of solar eclipses seen from Ukraine enumerates the solar eclipses that were seen and will be seen in Ukraine . 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 20th 21st

#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


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Meteorite / Meteorite


#1 Sołtmany (meteorite)

Sołtmany is an L6 ordinary chondrite meteorite which fell on 30 April 2011 in Sołtmany village, Poland . The fall occurred at around 6:00 am. A single meteorite penetrated the edge of a roof and shattered on concrete floor into several pieces. It was immediately found by the owners of the farm, alar


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Researcher / Researcher


#1 Johann Karl Burckhardt

Johann Karl Burckhardt (30 April 1773 – 22 June 1825) was a German-born astronomer and mathematician . He later became a naturalized French citizen and became known as Jean Charles Burckhardt . He is remembered in particular for his work in fundamental astronomy, and for his lunar theory , which was

#2 Ron Giovanelli

Ronald Gordon Giovanelli , DSc , FAA [1] ( /dʒoʊvɑ’nɛli/ ; 30 April 1915 — 27 January 1984) was an Australian solar researcher, astronomer and physicist , [2] who contributed to the fields of astrophysics , solar physics , radiative transfer , and astronomical optics. [3] His career spanned more tha

#3 Omer Blaes

Omer Michael Blaes (born April 30, 1961) is an American astrophysicist. He is a professor of physics at University of California, Santa Barbara . American astrophysicist Omer Blaes Born April 30, 1961   ( 1961-04-30 ) (age   61) Alma   mater Queen Mary University of London (BSc) International School

#4 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

#5 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

#6 John M. Grunsfeld

John Mace Grunsfeld (born October 10, 1958) is an American physicist and a former NASA astronaut . He is a veteran of five Space Shuttle flights and has served as NASA Chief Scientist . His academic background includes research in high energy astrophysics , cosmic ray physics and the emerging field

#7 Dandridge MacFarlan Cole

Dandridge MacFarlan Cole (February 19, 1921 – October 29, 1965) was an American aerospace engineer, futurist, lecturer, and author. This article's lead section may be too short to adequately summarize the key points . ( November 2021 ) Dandridge MacFarlan Cole Born ( 1921-02-19 ) February 19, 1921 S

#8 Robert Linderholm

Robert Glen Linderholm (October 19, 1933 – July 6, 2013) was an American amateur astronomer who discovered several asteroids . [2] He lived in Cambridge , Nebraska where he had a private observatory, Lime Creek . [3] [4] American astronomer Minor planets discovered: 26   [1] see §   List of discover

#9 Filippo Frontera

Filippo Frontera ( Savelli , 16 November 1941) is an Italian astrophysicist and professor, who deals with astronomical investigations on celestial gamma-rays . Italian astrophysicist (1941–) Filippo Frontera in 2012.

#10 Frances Woodworth Wright

Frances Woodworth Wright (April 30, 1897 – July 30, 1989) was an American astronomer based at Harvard University . During World War II , she taught celestial navigation to military officers and engineers. American astronomer Frances Woodworth Wright Frances Woodworth Wright at Harvard College Observ

#11 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

#12 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

#13 Grigory Neujmin

Grigory Nikolayevich Neujmin ( Russian : Григорий Николаевич Неуймин ; 3 January 1886 [ O.S. 22 December 1885 ] – 17 December 1946) was a Georgian– Russian astronomer , native of Tbilisi in Georgia , [2] and a discoverer of numerous minor planets as well as 6 periodic and a hyperbolic comet at the P

#14 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

#15 Osamu Muramatsu

Osamu Muramatsu ( 村松 修 , Muramatsu Osamu , born 1949) is a Japanese astronomer and discoverer of asteroids and comets . [2] He is credited by the Minor Planet Center with the discovery of 73 minor planets. [1] He also co-discovered 147P/Kushida-Muramatsu , a periodic comet . Japanese astronomer Mino

#16 Tao Hongjing

Tao Hongjing (456–536), courtesy name Tongming , was a Chinese alchemist, astronomer, calligrapher, military general, musician, physician, and pharmacologist, and writer during the Northern and Southern dynasties (420–589). A polymathic individual of many talents, he was best known as a founder of t

#17 Albert Einstein

Albert Einstein ( / ˈ aɪ n s t aɪ n / EYEN -styne ; [6] German: [ˈalbɛʁt ˈʔaɪnʃtaɪn] ( listen ) ; 14 March 1879   – 18 April 1955) was a German-born theoretical physicist , [7] widely acknowledged to be one of the greatest and most influential physicists of all time. Einstein is best known for devel

#18 Carl Friedrich Gauss

Johann Carl Friedrich Gauss ( / ɡ aʊ s / ; German : Gauß [kaʁl ˈfʁiːdʁɪç ˈɡaʊs] ( listen ) ; [2] [3] Latin : Carolus Fridericus Gauss ; 30 April 1777   – 23 February 1855) was a German mathematician and physicist who made significant contributions to many fields in mathematics and science. [4] Somet

#19 Jacob Bruce

Count James Daniel Bruce ( Russian : Я́ков Ви́лимович Брюс , tr. Yákov Vílimovich Bryus ; 11 May 1669 – 30 April 1735) was a Russian general, statesman, diplomat and scientist of Scottish descent ( Clan Bruce ), one of the chief associates of Peter the Great . According to his own record, his ancest

#20 Petr Pravec

Petr Pravec (born September 17, 1967) is a Czech astronomer and a discoverer of minor planets , born in Třinec , Czech Republic . [2] Czech astronomer Minor planets discovered: 350   [1] see §   List of discovered minor planets Pravec is a prolific discoverer of binary asteroids , expert in photomet


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Science / Science


#1 SGR 1935+2154

SGR 1935+2154 (or SGR J1935+2154 ) is a soft gamma repeater (SGR) that is an ancient stellar remnant , in the constellation Vulpecula , originally discovered in 2014 by the Neil Gehrels Swift Observatory . [1] Currently, the SGR-phenomena and the related anomalous X-ray pulsars (AXP) are explained a


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Star / Star


#1 V392 Persei

V392 Persei , also known as Nova Persei 2018 , is a bright nova in the constellation Perseus discovered on April 29, 2018. It was previously known as a dwarf nova . Nova in the constellation Perseus V392 Persei Location of V392 Persei (circled) Observation data Epoch J2000.0             Equinox J200

#2 V838 Monocerotis

V838 Monocerotis ( Nova Monocerotis 2002 ) is a spectroscopic binary star system in the constellation Monoceros about 19,000 light years (6 kpc ) from the Sun . The previously unremarked star was observed in early 2002 experiencing a major outburst, and was possibly one of the largest known stars fo

#3 SN 1006

SN 1006 was a supernova that is likely the brightest observed stellar event in recorded history, reaching an estimated −7.5 visual magnitude , [3] and exceeding roughly sixteen times the brightness of Venus. Appearing between April 30 and May 1, 1006, in the constellation of Lupus , this " guest sta

#4 EX Lupi

EX Lupi is a young, single [2] T-Tauri star in the southern constellation of Lupus . An irregular variable , [8] it is the prototype of young, low-mass eruptive stars named EXors, [2] with EX Lupi being this object's variable star designation . At its minimal activity level, EX Lupi resembles a clas

#5 Kelu-1

Kelu-1 / ˈ k eɪ l uː / is a system of two brown dwarfs of spectral types L2 and L4 [2] located in constellation Hydra at approximately 60.6 light-years from Earth . [4] It is among the first free-floating later-than-M-type brown dwarfs discovered, and sometimes considered as prototype of L-type brow


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