Feb 23 1990
From The Space Library
Pioneer 11, launched April 5, 1973, was 2.8 billion miles from Earth, passing the planet Neptune (Neptune and Pluto exchange outermost planet status because of Pluto's eccentric orbit) to become the fourth space-craft that had left the solar system. Its main mission was to glean data from Saturn and Jupiter, but scientists hoped that Pioneer 11 would send back information concerning solar winds until 1995. (C Trib, Feb 25/90; NY Times, Feb 25/90; NASA Release 90-29)
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