The Total Eclipse of the Moon 1913, March 21http://adsabs.harvard.edu/full/1913PA.....21..277B
The Indira Gandhi Planetarium was established on the 21st March 1993http://en.wikipedia.org/wiki/Patna_Planetarium
Mother's Day in most Arab countries is celebrated on the 21st March.
Harmony Day is held in Australia on 21 March. http://astronomy.activeboard.com/t48364676/harmony-day/World Poetry Day is on 21 Marchhttp://en.wikipedia.org/wiki/World_Poetry_DayEarth Day was first celebrated on March 21, 1970 http://astronomy.activeboard.com/t27225241/earth-day/
Planck day: On 21 March 2013, the Planck mission's all-sky map of the cosmic microwave background was releasedhttp://en.wikipedia.org/wiki/Planck_(spacecraft)
The Ranger 9 spacecraft was launched on the 21st March 1965.http://en.wikipedia.org/wiki/Ranger_9The first Jumpseat satellite was launched from Vandenberg Air Force Base on a Titan IIIB launch vehicle with Agena D boosters on 21 March 1971http://en.wikipedia.org/wiki/Jumpseat_(satellite)Breitling Orbiter 3 was the first balloon to fly around the world non-stop in 1999. http://astronomy.activeboard.com/t48364789/breitling-orbiter-3/The IRS-P3 satellite was launched on the 21st March 1996http://en.wikipedia.org/wiki/IRS-P3
Rudolf Nebel (March 21, 1894 - September 18, 1978) was a spaceflight advocatehttp://en.wikipedia.org/wiki/Rudolf_NebelDirk Dries David Damiaan, Viscount Frimout (born 21 March 1941) is an astrophysicist for the European Space Agency. http://en.wikipedia.org/wiki/Dirk_FrimoutAlexander Fedorovich Mozhaysky (March 21, 1825 - 1 April 1890), was a Russian naval officer, aviation pioneerhttp://en.wikipedia.org/wiki/Alexander_Mozhaysky
Maurice Alain Farman (March 21, 1877 - February 25, 1964) was an Anglo-French Grand Prix champion.https://en.wikipedia.org/wiki/Maurice_Farman
George Witchell (1728 - 1785) was an astronomer and mathematicianhttp://astronomy.activeboard.com/t53058787/george-witchell/
Jean-Baptiste Joseph Fourier (21 March 1768 - 16 May 1830) was a French mathematician and physicisthttps://en.wikipedia.org/wiki/Joseph_FourierPietro Tacchini (March 21, 1838 - March 24, 1905) was an Italian astronomer.http://en.wikipedia.org/wiki/Pietro_TacchiniGuillermo Haro (March 21, 1913 - April 26, 1988) was a Mexican astronomer.http://en.wikipedia.org/wiki/Guillermo_HaroHalton Christian Arp (March 21, 1927 - December 28, 2013) was an American astronomer.http://en.wikipedia.org/wiki/Halton_ArpAntonia Maury (March 21, 1866 - January 8, 1952) was an American astronomer who published an early catalogue of stellar spectra. http://en.wikipedia.org/wiki/Antonia_Maury
NGC 2744 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083519/ngc-2744/NGC 2774 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083511/ngc-2774/NGC 2802 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083505/ngc-2802/NGC 2803 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083489/ngc-2803/NGC 2843 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083480/ngc-2843/NGC 3303 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t33241866/ngc-3303/NGC 3370 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t2950430/ngc-3370/NGC 4126 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083419/ngc-4126/NGC 4152 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083414/ngc-4152/NGC 4350 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083408/ngc-4350/NGC 4379 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083403/ngc-4379/NGC 4489 was discovered by William Herschel using on the 21st March 1784.http://astronomy.activeboard.com/t57083393/ngc-4489/NGC 4498 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083389/ngc-4498/NGC 4502 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083377/ngc-4502/NGC 4515 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083368/ngc-4515/NGC 4540 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083362/ngc-4540/NGC 4710 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t32352136/ngc-4710/NGC 4758 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083339/ngc-4758/NGC 5249 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083331/ngc-5249/NGC 5962 was discovered by William Herschel using on the 21st March 1784.http://astronomy.activeboard.com/t57083320/ngc-5962/NGC 5996 was discovered by William Herschel on the 21st March 1784.http://astronomy.activeboard.com/t57083308/ngc-5996/
Tethys, a moon of Saturn, was discovered by Giovanni Cassini on the 21st March 1684http://en.wikipedia.org/wiki/Sidera_LodoiceaDione, a moon of Saturn, was discovered by Giovanni Cassini on the 21st March 1684http://en.wikipedia.org/wiki/Sidera_LodoiceaFrench astronomer Frédéric Petit in 1846 announced that he had discovered a second moon around the Earth.http://en.wikipedia.org/wiki/Other_moons_of_Earth#Petit.27s_moon
Asteroid (194) Prokne was discovered by German-American astronomer C. H. F. Peters on March 21, 1879http://en.wikipedia.org/wiki/194_ProkneAsteroid (329) Svea was discovered by Max Wolf on March 21, 1892http://en.wikipedia.org/wiki/329_SveaAsteroid (365) Corduba was discovered by the French astronomer Auguste Charlois on March 21, 1893http://en.wikipedia.org/wiki/365_CordubaAsteroid (366) Vincentina was discovered on March 21, 1893http://en.wikipedia.org/wiki/366_VincentinaAsteroid (402) Chloë was discovered by Auguste Charlois on March 21, 1895http://en.wikipedia.org/wiki/402_Chlo%C3%ABAsteroid (631) Philippina was discovered by German astronomer August Kopff on March 21, 1907.http://en.wikipedia.org/wiki/631_PhilippinaPreliminary reports had asteroid (143649) 2003 QQ47 a chance of impacting into Earth on March 21, 2014.http://astronomy.activeboard.com/t57083537/asteroid-143649-2003-qq47/
The annual Delta Pavonids meteor shower appears from 21 March to 8 Aprilhttp://en.wikipedia.org/wiki/Pavo_(constellation)#Meteor_showersConnecticut Meteor of 21 March 1813http://astronomy.activeboard.com/t57084002/meteor-of-21-march-1813/The Ch'ing-yang event of 1490 is a presumed meteor shower in the Chinese province of Shaanxi.http://en.wikipedia.org/wiki/1490_Ch%27ing-yang_event
MeteoritesNo historic meteorite falls today