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Period: to
Space
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First Earth orbiter
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First lunar impact
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First manned Earth orbiter
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First successful Venus flyby
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First Mars flyby
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First Venus impact
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First lunar lander
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First Venus atmospheric probe
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First lunar flyby and return to Earth
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First manned lunar orbiter
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First manned lunar Landing
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First Venus lander
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Closest solar approach
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Jupiter/Saturn flyby, first to leave Solar System
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Jupiter/Saturn flyby, first to leave Solar System
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Venus orbiter
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first asteroid landing
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first near-Earth asteroid flyby
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first asteroid orbit
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Mars lander and first Mars rover
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First Saturn orbiter and first Titan lander
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First comet coma sample return
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First solar wind sample return
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First comet impact
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First Pluto/Charon and Kuiper Belt flyby