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Teh first artificial sattelite in space!!!
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Mariner 2 verified high temperatures on venus
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pioneer 10 was the first space probe to get past the astroid belt.
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Viking 1 mapped the surface of Mars it searched for life.
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Vaoyager 1 and Voyager 2 space probes launched in 1977!!!
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Mapped Venus's surface and returned the data.
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