The 15 first

First impact into Mars

Nov 27, 1971

Closest flyby of the sun

Apr 17, 1976

Ultraviolet orbital observatory

Mar 23, 1983

First untethered spacewalk

Feb 7, 1984

Ultraviolet to gamma ray spectrum orbital observatory

Dec 1, 1989

First landing on an asteroid

Apr 24, 1990

record the longest duration spacefight

Mar 22, 1995

First mission into the atmosphere of a gas giant

Dec 7, 1995

First landing on an asteroid

Feb 12, 2001

first sample returned from come

Jul 1, 2004

first soft landing on titan

Jan 14, 2005

first sample returned from come

Jan 15, 2006

first orbit in mercury

Mar 18, 2011

first manmade probe to land a coment

Nov 12, 2014

First orbital gamma ray observatory

Nov 15, 2014