This page no longer updated from 31 October 2001. Latest version can be found at Pioneer

Program: Pioneer. Objective: Planetary. Type: Lunar. Overview: The Jet Propulsion Laboratory Pioneer series were the first US probes sent towards the moon. Later Pioneers explored the heliocentric space environment and were the first spacecraft to reach the outer planets and to escape from the solar system. Major Events: .
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Last update 12 March 2001.
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© Mark Wade, 2001 .