The 15 first By lesly_perez Nov 27, 1971 First impact into Mars Apr 17, 1976 Closest flyby of the sun Mar 23, 1983 Ultraviolet orbital observatory Feb 7, 1984 First untethered spacewalk Dec 1, 1989 Ultraviolet to gamma ray spectrum orbital observatory Apr 24, 1990 First landing on an asteroid Mar 22, 1995 record the longest duration spacefight Dec 7, 1995 First mission into the atmosphere of a gas giant Feb 12, 2001 First landing on an asteroid Jul 1, 2004 first sample returned from come Jan 14, 2005 first soft landing on titan Jan 15, 2006 first sample returned from come Mar 18, 2011 first orbit in mercury Nov 12, 2014 first manmade probe to land a coment Nov 15, 2014 First orbital gamma ray observatory