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Sputnik 1 was the first satelite to orbit earth
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Exact date was not given... Mercury Program was launched
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Mariner 1's launch failed and it didn't make it into space.
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Gemni program was launched
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One of the many Pioneer propbes was launched
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The first Viking Probe was launched
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The second of the 2 Viking probes was launched
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The second voyager was launched (2nd of 2)
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The first voyager is launched (out of 2)
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The first space shuttle was launched.
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Magellan probe was launched
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Galileo telescope was launched
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The massive telescope Hubble was launched to take pictures of space.
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Cassini spacecraft was launched
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One of the few space stations was launched into space. IT was the most important space station
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First Mars Rover was launched.
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Second Mars Rover was launched.
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Last Mars Rover was launched. This was the end of space exploration.