The eclipse of February 17, B.C. 478http://adsabs.harvard.edu/full/1908Obs....31..354L The eclipse of Xerxes
The Roman festival Quirinalia was held on the 17th February. http://astronomy.activeboard.com/t47864020/quirinus/
Troll research station was officially opened on 17 February 1990http://en.wikipedia.org/wiki/Troll_(research_station)
Discovery of a submarine hydrothermal vent ecosystem on February 17, 1977https://en.wikipedia.org/wiki/Hydrothermal_vent#Discovery_and_exploration
The Confederate submarine H.L. Hunley, became the first to sink an enemy vessel, the USS Housatonic, on February 17, 1864, during the Civil Warhttp://en.wikipedia.org/wiki/Blue_light_(pyrotechnic_signal)#Blue_lantern_myth
Vanguard 2 is an earth-orbiting satellite launched February 17, 1959http://astronomy.activeboard.com/t16877487/vanguard-2-satellite/
Discoverer 20, also known as Corona 9014A, was launched in 1961.http://en.wikipedia.org/wiki/Discoverer_20The Ranger 8 spacecraft was launched on February 17, 1965http://astronomy.activeboard.com/t34105020/ranger-8-spacecraft/
The Mir space station was authorised on the 17th February 1976 https://en.wikipedia.org/wiki/Mir#OriginsThe Near Earth Asteroid Rendezvous (NEAR) spacecraft was launched in 1996http://astronomy.activeboard.com/t41208306/near-spacecraft/
The Dawn space probe made its closest approach (549 km) to Mars on February 17, 2009http://en.wikipedia.org/wiki/Dawn_(spacecraft)#Cruise
Otto Stern (17 February 1888 - 17 August 1969) was a German physicisthttp://astronomy.activeboard.com/t47864147/otto-stern-1888-1969/Italian astronomer Giordano Bruno (1548 - February 17, 1600) was burned at the stake for heresyhttp://astronomy.activeboard.com/t52672826/giordano-bruno-1548-1600/Tobias Mayer (17 February 1723 - 20 February 1762) was a German astronomerhttp://en.wikipedia.org/wiki/Tobias_Mayer
The Opera Madame Butterfly premièred at La Scala in Milan in 1904http://en.wikipedia.org/wiki/Madama_Butterfly
Galaxy Zoo 2 went live on 17 February 2009.http://en.wikipedia.org/wiki/Galaxy_Zoo#Galaxy_Zoo_2
NGC 2244 was discovered by John Flamsteed on the 17th February 1690.http://astronomy.activeboard.com/t10075829/ngc2244/NGC 2553 was discovered by Albert Marth on the 17th February 1865.http://astronomy.activeboard.com/t56751251/ngc-2553/NGC 2556 was discovered by Albert Marth on the 17th February 1865.http://astronomy.activeboard.com/t56751230/ngc-2556/NGC 2806 was discovered by Heinrich Louis d'Arrest on the 17th February 1862.http://astronomy.activeboard.com/t56751208/ngc-2806/NGC 2807 was discovered by Heinrich Louis d'Arrest on the 17th February 1863.http://astronomy.activeboard.com/t56751194/ngc-2807/NGC 2812 was discovered by Albert Marth on the 17th February 1865.http://astronomy.activeboard.com/t56751181/ngc-2812/NGC 2813 was discovered by Albert Marth on the 17th February 1865.http://astronomy.activeboard.com/t56751158/ngc-2813/NGC 4542 was discovered by John Herschel on the 17th February 1831.http://astronomy.activeboard.com/t56751138/ngc-4542/
Trans-Neptunian object 90482 Orcus was discovered on February 17, 2004http://en.wikipedia.org/wiki/90482_OrcusCassini imaged degraded craters on Enceladus on February 17, 2005http://en.wikipedia.org/wiki/File:EN003_Degraded_Craters_on_Enceladus.jpgIda's moon, Dactyl, was discovered on 17 February 1994http://en.wikipedia.org/wiki/243_Ida#MoonAsteroid (97) Klotho was found by Ernst Tempel on February 17, 1868http://en.wikipedia.org/wiki/97_KlothoAsteroid (130) Elektra was discovered by C. H. F. Peters on February 17, 1873http://astronomy.activeboard.com/t44418037/asteroid-130-elektra/
A large meteor was sighted near Stirling Castle in 2006.http://astronomy.activeboard.com/t6111083/stirling-meteorite/
MeteoritesThe Paragould (LL5) meteorite fell in Arkansas, USA, on the 17th February, 1930.http://astronomy.activeboard.com/t25050458/paragould-meteorite/