Annular-Total Eclipse of the Sun 1713 December 17http://astro.ukho.gov.uk/eclipse/0541713/S1713Dec17.pdfAnnular Solar Eclipse of 168 December 17.http://eclipse.gsfc.nasa.gov/SEsearch/SEsearchmap.php?Ecl=01681217
Saturnalia is an Ancient Roman festival or celebration held in honour of Saturn (Cronus)http://astronomy.activeboard.com/t46846335/saturnalia/
On December 17, 1790 the Aztec calendar stone was discovered in Mexico City Cathedral http://astronomy.activeboard.com/t46846323/aztec-calendar-stone/In 1919 meteorologist Albert Porta predicted that the world would end on December 17http://astronomy.activeboard.com/t51935543/albert-porta/The last day of Project Blue Book operations was December 17, 1969.http://en.wikipedia.org/wiki/Project_Blue_Book#The_EndManhattan Project: Reactor D was started on 17 December 1944http://en.wikipedia.org/wiki/Manhattan_Project
Construction of the IceCube Neutrino Observatory was completed on 17 December 2010 http://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory
The Wright Flyer flew four times on December 17, 1903http://en.wikipedia.org/wiki/Wright_Flyer
The Douglas DC-3 first flew on the 17th December 1935https://en.wikipedia.org/wiki/Douglas_DC-3Project Mercury was officially approved 7 October 1958 and publicly announced on 17 Decemberhttp://en.wikipedia.org/wiki/Project_Mercury
The SpaceShipOne first achieved supersonic flight on December 17, 2003https://en.wikipedia.org/wiki/SpaceShipOne
The first Thaicom satellite was launched on December 17, 1993.http://en.wikipedia.org/wiki/ThaicomELISA 1, ELISA 2, ELISA 3 and ELISA 4 satellites were launched on 17 December 2011http://en.wikipedia.org/wiki/ELISA_(satellite)GRAIL impacted the Moon on December 17 2012http://astronomy.activeboard.com/t17115874/gravity-recovery-and-interior-laboratory-mission/Flight 11P of SpaceShipOne occurred on December 17, 2003.http://en.wikipedia.org/wiki/SpaceShipOne_flight_11P
Friedrich Otto Schott (17 December 1851 - died 27 August 1935) was a German glass technologisthttp://en.wikipedia.org/wiki/Otto_SchottSir Humphry Davy (17 December 1778 - 29 May 1829) was an English chemisthttp://en.wikipedia.org/wiki/Humphry_DavyWillard Frank Libby (December 17, 1908 - September 8, 1980) was an American physical chemisthttp://astronomy.activeboard.com/t46846293/willard-frank-libby-1908-1980/Dame Mary Lucy Cartwright (17 December 1900 - 3 April 1998) was a British mathematicianhttp://en.wikipedia.org/wiki/Mary_CartwrightMarius Sophus Lie (17 December 1842 - 18 February 1899) was a Norwegian mathematician.http://astronomy.activeboard.com/t46846307/marius-sophus-lie-1842-1899/Gabrielle Emilie Le Tonnelier de Breteuil (17 December 1706 - 10 September 1749) was a French mathematicianhttp://astronomy.activeboard.com/t7883080/emilie-du-chtelet-1706-1749/Joseph Henry (December 17, 1797 - May 13, 1878) was an American scientisthttp://en.wikipedia.org/wiki/Joseph_HenryParis M. Herouni (December 17, 1933 - December 5, 2008 ]) was an Armenian professorhttp://en.wikipedia.org/wiki/Paris_HerouniMartin Arthur Pomerantz (December 17, 1916 - October 26, 2008) was an American physicisthttp://en.wikipedia.org/wiki/Martin_A._PomerantzFrederick Talbot (17 December 1949) is a Scottish-born television presenter and meteorologisthttp://en.wikipedia.org/wiki/Fred_Talbot
Milo Tichư (born 1966) is a Czech astronomer. https://en.wikipedia.org/wiki/Milo%C5%A1_Tich%C3%BDWilliam Harkness (December 17, 1837 - February 28, 1903) was a Scottish astronomerhttp://en.wikipedia.org/wiki/William_Harkness
Placemarker
NGC 518 was discovered by German astronomer Albert Marth on the 17th December 1864. http://astronomy.activeboard.com/t55947449/ngc-518/
Comet SkorichenkoGeorge was discovered with 8x20 binoculars on December 17, 1989http://en.wikipedia.org/wiki/Comet_Skorichenko%E2%80%93GeorgeComet C/1652 Y1 was First spotted on December 17, 1652, http://en.wikipedia.org/wiki/C/1652_Y1
Notes on Kansas Meteorites: Metoric Fall of December 17, 1923 http://astronomy.activeboard.com/t55946929/kansas-meteor-1923/The Ursids meteor activity begins annually around December 17http://en.wikipedia.org/wiki/Ursids
MeteoritesNo historical meteorite falls today, AFAIK