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Pioneer

A Dictionary of Earth Sciences | 1999 | | © A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

Pioneer A series of NASA spacecraft that conducted explorations of the solar system. Pioneer 10, launched on 2 March 1972, was the first spacecraft to leave the solar system, in 1987. Pioneer 11 was launched on 5 April 1973, for Saturn. Pioneer Venus, launched in 1978 to Venus, comprised an orbiter and probes sent to the surface.

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AILSA ALLABY and MICHAEL ALLABY. "Pioneer." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Nov. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Pioneer." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (November 11, 2009). http://www.encyclopedia.com/doc/1O13-Pioneer.html

AILSA ALLABY and MICHAEL ALLABY. "Pioneer." A Dictionary of Earth Sciences. 1999. Retrieved November 11, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Pioneer.html

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