Near Miss: The Solar Superstorm of July 2012http://science.nasa.gov/science-news/science-at-nasa/2014/23jul_superstorm/
The Neptunalia was an obscure archaic two-day festival, celebrated at Rome, probably on July 23http://en.wikipedia.org/wiki/Neptunalia
On July 23rd, 1985, the Commodore Amiga was unveiled at the Lincoln Centre in New York.http://astronomy.activeboard.com/t3619637/amiga-turns-20/
Landsat 1 was launched on the 23rd July 1972 http://astronomy.activeboard.com/t30351314/landsat-satellite/Soyuz 37 was launched on the 23rd July 1980 http://en.wikipedia.org/wiki/Soyuz_37On July 23, 1980, Pham Tuan of Vietnam became the first Asian in space when he flew aboard Soyuz 37http://en.wikipedia.org/wiki/Pham_TuanSTS-93 Space Shuttle Columbia, was launched on the 23rd July 1999http://en.wikipedia.org/wiki/STS-93Anniversary of the Chandra X-Ray Observatory, which was launched on July 23, 1999http://chandra.harvard.edu/about/axaf_mission.html
Elliot McKay See, Jr. (July 23, 1927 February 28, 1966), was an American astronaut http://en.wikipedia.org/wiki/Elliot_SeeThomas Brisbane (23 July 1773 - 27 January 1860) was Governor of New South Wales (1821-25)http://en.wikipedia.org/wiki/Thomas_BrisbaneHaile Selassie I (23 July 1892 - 27 August 1975) was Emperor of Ethiopia from 1930 to 1974. http://en.wikipedia.org/wiki/Haile_SelassieEtienne-Louis Malus (23 July 1775 - 24 February 1812) was a French officer, engineer, physicist, and mathematician.http://en.wikipedia.org/wiki/%C3%89tienne-Louis_MalusWalter Hermann Schottky (23 July 1886 - 4 March 1976) was a German physicist http://en.wikipedia.org/wiki/Walter_H._SchottkyAndrew E. Lange (July 23, 1957 - January 22, 2010 was an astrophysicisthttp://en.wikipedia.org/wiki/Andrew_E._LangeVera (Cooper) Rubin (July 23, 1928 - December 26, 2016) was an American astronomer. http://en.wikipedia.org/wiki/Vera_RubinCharles Edward Barns (July 23, 1862 - May 24, 1937) was an American writerhttp://en.wikipedia.org/wiki/Charles_Edward_Barns#Astronomy_.26_Printing_Press
Space: 1999 premiered on 23 July 1975 in Australiahttp://en.wikipedia.org/wiki/List_of_Space:_1999_episodes
NGC 6636 was discovered by American astronomer Lewis A. Swift on the 23rd July 1884.http://astronomy.activeboard.com/t58132086/ngc-6636/NGC 6704 was discovered by German astronomer Friedrich August Theodor Winnecke on the 23rd July 1854. http://astronomy.activeboard.com/t58132071/ngc-6704/NGC 6730 was discovered by British astronomer John Herschel on the 23rd July 1835. http://astronomy.activeboard.com/t58132061/ngc-6730/NGC 6866 was discovered by German astronomer Caroline Herschel on the 23rd July 1783.http://astronomy.activeboard.com/t58132051/ngc-6866/
Discovery of the rings of Neptune in 1984http://en.wikipedia.org/wiki/Rings_of_NeptuneAsteroid (114) Kassandra was discovered by C. H. F. Peters on July 23, 1871http://astronomy.activeboard.com/t56780216/asteroid-114-kassandra/Asteroid (405) Thia was discovered by Auguste Charlois on July 23, 1895, in Nice. http://astronomy.activeboard.com/t42872137/asteroid-405-thia/
Comet Hale-Bopp was discovered on July 23, 1995http://astronomy.activeboard.com/t3020406/comet-hale-bopp/Hubble Space Telescope image of comet C/1999 S4 (LINEAR) that disintegrated around July 23, 2000.http://en.wikipedia.org/wiki/File:CometLinear.jpgStart watching for Perseidshttp://en.wikipedia.org/wiki/Perseids
MeteoritesThe Lancé (CO3.5 chondrite) meteorite fell in Centre, France, on the 23rd July 1872.http://astronomy.activeboard.com/t44051524/lanc-meteorite/The Bahjoi (Iron) meteorite fell in Uttar Pradesh, India, on the 23rd July 1934.http://astronomy.activeboard.com/t44051530/bahjoi-meteorite/