A total solar eclipse occurred on July 31, 1981.http://en.wikipedia.org/wiki/Solar_eclipse_of_July_31,_1981A total solar eclipse occurred on August 31, 1932. http://en.wikipedia.org/wiki/Solar_eclipse_of_August_31,_1932
Lughnasadh or Lughnasa is a Gaelic festival marking the beginning of the harvest season held on 31 July 1 August. http://en.wikipedia.org/wiki/Lughnasadh
The Royal Meteorological Institute of Belgium was established on July 31, 1913http://en.wikipedia.org/wiki/Royal_Meteorological_InstituteAn Italian expedition succeeded in ascending to the summit of K2 via the Abruzzi Spur on 31 July 1954. http://astronomy.activeboard.com/t50234756/k2/
Anniversary of the failure of a rocket demonstration by Gerhard Zucker for officials of the British Royal Mail on July 31, 1934http://astronomy.activeboard.com/t35246304/gerhard-zucker/Mariner 6 Mars flyby in 1969.http://astronomy.activeboard.com/t44181373/mariner-6-mission/Ranger 7 reached the Moon on 31 July, 1964http://www.youtube.com/watch?v=i9y5d0l_O3YThe Lunar rover was first used on July 31, 1971, during the Apollo 15 mission.http://en.wikipedia.org/wiki/Lunar_Rover#Apollo_Lunar_Roving_VehicleSTS-46 was a NASA space shuttle mission using Space Shuttle Atlantis and launched on 31 July 1992http://en.wikipedia.org/wiki/STS-46The Lunar Prospector impacted the moon in 1999http://astronomy.activeboard.com/t44181385/lunar-prospector-mission/On July 31, 1999, some of Eugene Shoemaker's ashes were carried to the Moon by the Lunar Prospector space probehttp://en.wikipedia.org/wiki/Eugene_Merle_Shoemaker#Death
Pratiwi Pujilestari Sudarmono (born July 31, 1952 in Bandung) is an Indonesian scientist. http://en.wikipedia.org/wiki/Pratiwi_SudarmonoThe Reverend George Fisher (31 July 1794 - 14 March 1873) was a British Arctic scientist.http://en.wikipedia.org/wiki/George_Fisher_(scientist)John Canton (31 July 1718 - 22 March 1772) was an English physicist.http://en.wikipedia.org/wiki/John_CantonDaniel Friedrich Ernst Meissel (31 July 1826 - 11 March 1895) was a German astronomerhttp://en.wikipedia.org/wiki/Ernst_MeisselCarl Theodor Anger (31 July 1803 - 25 March 1858) was a German mathematician and astronomerhttp://en.wikipedia.org/wiki/Carl_Theodor_AngerJohn P. Hagen (1908-1990) was director of the Vanguard program during the 1950s. http://history.nasa.gov/sputnik/hagen.htmlJeremy R. Mould (born 31 July 1949) is an Australian astronomer http://en.wikipedia.org/wiki/Jeremy_Mould
David James Tholen (born 1955) is an American astronomerhttp://en.wikipedia.org/wiki/David_J._TholenNecia H. Apfel (born July 31, 1930) is an American astronomer. http://en.wikipedia.org/wiki/Necia_H._Apfel
*Placemarker
NGC 6605 was discovered by British astronomer John Herschel on the 31st July 1826. http://astronomy.activeboard.com/t58202815/ngc-6605/NGC 6625 was discovered by British astronomer John Herschel on the 31st July 1826. http://astronomy.activeboard.com/t58202802/ngc-6625/NGC 6633 was independently rediscovered by German astronomer Caroline Herschel on the 31st July 1783.http://astronomy.activeboard.com/t58202789/ngc-6633/IC 4665 was independently rediscovered by German astronomer Caroline Herschel on the 31st July 1783.http://astronomy.activeboard.com/t58202732/ic-4665/NGC 6639 was discovered by British astronomer John Herschel on the 31st July 1826. http://astronomy.activeboard.com/t58202693/ngc-6639/NGC 6923 was discovered by British astronomer John Herschel on the 31st July 1834. http://astronomy.activeboard.com/t58202665/ngc-6923/NGC 6925 was discovered by British astronomer John Herschel on the 31st July 1834. http://astronomy.activeboard.com/t58202654/ngc-6925/
Supernova 2004dj was discovered by Koichi Itagaki on July 31, 2004. http://en.wikipedia.org/wiki/SN_2004djGamma Scorpii was renamed Sigma Librae on July 31, 1930http://en.wikipedia.org/wiki/Sigma_LibraeAsteroid (122) Gerda was discovered by German-American astronomer C. H. F. Peters on July 31, 1872http://en.wikipedia.org/wiki/122_GerdaAsteroid (123) Brunhild was discovered by German-American astronomer C. H. F. Peters on July 31, 1872http://en.wikipedia.org/wiki/123_Brunhild
Comet C/1345 O1 made a close approach to the Earth (0.0485 AU) on the 31st July 1345.http://astronomy.activeboard.com/t60624402/comet-c1345-o1/
Photograph of an alleged UFO in New Jersey, taken on July 31, 1952https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/csi-studies/studies/97unclass/p69.gif/image.gif
MeteoritesThe Charlotte (Iron, IVA) meteorite fell in Tennessee, USA, on the 31st July 1835.http://astronomy.activeboard.com/t44181299/charlotte-meteorite/The Wuan (H6 chondrite) meteorite fell in Hebei, China, on the 31st July 1986.http://astronomy.activeboard.com/t44181305/wuan-meteorite/The Jodiya (L5) meteorite fell in Gujarat, India, on the 31st July 2006.http://astronomy.activeboard.com/t7844990/little-rann-bolide/