Beltane is a festival that takes place on the first day of May. http://en.wikipedia.org/wiki/BeltaneBona Dea ("The Good Goddess") was a divinity in ancient Roman religion. http://en.wikipedia.org/wiki/Bona_Dea#Festival_and_cultMaharashtra Day is a state holiday in Maharashtra, India on 1 May. http://en.wikipedia.org/wiki/Maharashtra_Day
Species Plantarum ("The Species of Plants") was first published in 1753http://en.wikipedia.org/wiki/Species_Plantarum
BASIC (Beginner's All-purpose Symbolic Instruction Code) first appeared on 1st May 1964https://en.wikipedia.org/wiki/BASIC
The Armagh Planetarium was opened to the public on 1 May, 1968.http://en.wikipedia.org/wiki/Armagh_Planetarium#HistoryThe Paris Observatory was inaugurated by Louis XIV and his court on May 1, 1682.https://sites.google.com/site/histoireobsparis/a-short-history-of-paris-observatory
The Archenhold Observatory was opened to the public on 1 May 1896http://en.wikipedia.org/wiki/Archenhold_ObservatoryGroundbreaking for the Green Bank Telescope, was on 1 May 1991.http://www.nrao.edu/archives/Timeline/GBTgrbr.shtml
The 1960 U-2 incident occurred during the Cold War on 1 May 1960
On May 1, 1996, the Ulysses spacecraft unexpectedly crossed the ion tail of Comet Hyakutake (C/1996 B2)http://en.wikipedia.org/wiki/Ulysses_(spacecraft)#Comet_C.2F1996_B2_.28Hyakutake.29
NASA's Mars Exploration Rover Spirit became stuck on sol 1892 (May 1, 2009)http://en.wikipedia.org/wiki/Spirit_(rover)
Malcolm Scott Carpenter (1925 - 2013) was an American test pilot, astronaut and aquanaut.http://astronomy.activeboard.com/t53538778/scott-carpenter/Flotilla Admiral Otto Kretschmer (1 May 1912 - 5 August 1998) was a German U-boat commanderhttp://en.wikipedia.org/wiki/Otto_KretschmerThe remains of George Mallory were discovered on 1 May 1999. http://en.wikipedia.org/wiki/George_MalloryNaomi Uemura (1941 - 1984) was the first person ever to reach the North Pole solo on 1 May 1978https://en.wikipedia.org/wiki/Naomi_Uemura#North_PoleMartha Jane Canary (May 1, 1852 - August 1, 1903), better known as Calamity Jane, was an American frontierswomanhttp://en.wikipedia.org/wiki/Calamity_JaneEvelyn Boyd Granville (born May 1, 1924) was the second African-American woman in the U.S. to receive a PhD in mathematics.http://en.wikipedia.org/wiki/Evelyn_Boyd_GranvilleJohann Jakob Balmer (May 1, 1825 - March 12, 1898) was a Swiss mathematicianhttp://en.wikipedia.org/wiki/Johann_Jakob_BalmerMorris Kline (May 1, 1908 - June 10, 1992) was a Professor of Mathematicshttp://en.wikipedia.org/wiki/Morris_Kline
Edward Joshua Cooper (May 1798 - 23 April 1863) was an Irish landowner, politician and astronomerhttps://en.wikipedia.org/wiki/Edward_Joshua_CooperWalter Goodacre (1856 - May 1, 1938) was a British businessman and amateur astronomer.http://astronomy.activeboard.com/t54109879/walter-goodacre-1856-1938/Johann Adam Schall von Bell (May 1, 1592 - August 15, 1666) was a German Jesuit and astronomerhttp://en.wikipedia.org/wiki/Johann_Adam_Schall_von_BellJohannes Stadius (ca. 1 May 1527-17 June 1579), was a Flemish astronomerhttp://en.wikipedia.org/wiki/Johannes_StadiusGavriil Adrianovich Tikhov (May 1, 1875 - 1960) was a Belarusian astronomerhttp://en.wikipedia.org/wiki/Gavriil_Adrianovich_TikhovDr. Josef Allen Hynek (May 1, 1910 - April 27, 1986) was a United States astronomerhttp://astronomy.activeboard.com/t48952091/dr-josef-allen-hynek-1910-1986/
Kazuro Watanabe (born May 1, 1955) is an amateur Japanese astronomer. http://en.wikipedia.org/wiki/Kazuro_Watanabe
Ian William Ridpath (born 1 May 1947, Ilford, Essex) is an English science writer http://en.wikipedia.org/wiki/Ian_Ridpath
The film 'After Earth' premièred on May 1st 2013 in Tokyohttp://en.wikipedia.org/wiki/After_Earth
NGC 2896 was discovered by Danish-German astronomer Heinrich Louis d'Arrest on the 1st May 1864.http://astronomy.activeboard.com/t57444827/ngc-2896/NGC 3167 is a non-existent object located in the constellation Leo Minor.http://astronomy.activeboard.com/t57444823/ngc-3167/NGC 3354 was discovered by British astronomer John Herschel on the 1st May 1834.http://astronomy.activeboard.com/t57444807/ngc-3354/NGC 5140 was discovered by British astronomer John Herschel on the 1st May 1834.http://astronomy.activeboard.com/t57444797/ngc-5140/NGC 5141 was discovered by German-British astronomer William Herschel on the 1st May 1785.http://astronomy.activeboard.com/t57444787/ngc-5141/NGC 5142 was discovered by German-British astronomer William Herschel on the 1st May 1785.http://astronomy.activeboard.com/t57444779/ngc-5142/NGC 5149 was discovered by German-British astronomer William Herschel on the 1st May 1785.http://astronomy.activeboard.com/t57444773/ngc-5149/NGC 5223 was discovered by German-British astronomer William Herschel on the 1st May 1785.http://astronomy.activeboard.com/t57444766/ngc-5223/NGC 5228 was discovered by German-British astronomer William Herschel on the 1st May 1785.http://astronomy.activeboard.com/t57444752/ngc-5228/ NGC 5240 was discovered by German-British astronomer William Herschel on the 1st May 1785.http://astronomy.activeboard.com/t57444743/ngc-5240/NGC 5681 was discovered by Danish-German astronomer Heinrich Louis d'Arrest on the 1st May 1865.http://astronomy.activeboard.com/t57444735/ngc-5681/
Nereid, the third-largest moon of Neptune, was discovered on May 1, 1949http://en.wikipedia.org/wiki/Nereid_(moon)The name of Pluto was announced on May 1, 1930http://en.wikipedia.org/wiki/Pluto#NameThe discovery images of the moon Daphnis were taken by the Cassini probe on May 1, 2005http://photojournal.jpl.nasa.gov/catalog/PIA06237The discovery of S/2007 S 2 a natural satellite of Saturn was announced on May 1, 2007http://en.wikipedia.org/wiki/S/2007_S_2The discovery of S/2007 S 3 a natural satellite of Saturn was announced on May 1, 2007http://en.wikipedia.org/wiki/S/2007_S_3J is a provisional designation prefix for some objects discovered between May 1 and 15http://en.wikipedia.org/wiki/Provisional_designation_in_astronomyIn 1998, the Martian meteorite Dar al Gani 476 was found in the Libyan desert.http://astronomy.activeboard.com/t53537882/dar-al-gani-476/
MeteoritesThe New Concord (L6) meteorite fell in Ohio, USA, on the 1st May, 1860.http://astronomy.activeboard.com/t48951964/new-concord-meteorite/The Adhi Kot (EH4) meteorite fell in Punjab, Pakistan, on the 1st May, 1919.http://astronomy.activeboard.com/t48951971/adhi-kot-meteorite/The Ksar el Hajoui (LL6 chondrite) meteorite fell in Morocco/Algeria, on the 1st May, 2010.http://astronomy.activeboard.com/t57442787/ksar-el-hajoui-meteorite/