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Pioneer program

A program of unmanned space missions designed for planetary exploration. There were a number of such missions in the program, but the most notable were Pioneer 10 and Pioneer 11, which explored the outer planets and left the solar system. Both carry a golden plaque (see Pioneer plaque), depicting a man and a woman and information about the origin and the creators of the probes, should any Extraterrestrials find them someday.

See also: Timeline of Planetary Exploration



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