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  The first man to enter space and come back. Got the USA involved in space programs
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  Studies on Venus
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  Sent out to orbit other planets and learn obout their atomosphere
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  This wasnt actually launched on April 3rd. Discovered water channels on Mars.
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  First high definition pictures of Mars.
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  First manmade object to go into space and they are still working today.
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  Saturn moon elxploration.This orbited theTitan (one of saturn's moon's) 75 times.
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  Retired after 135 missions in 2012. First reusable space shuttle.
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  It was a space test to see how long a person could stay in space.
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  This mission was to learn about Venus and its surface. The launch day is not correct.
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  Landed on Jupiter, sent to explore and learn more about Jupiter.
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  A telescope that can see deep into space.
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  Not correct ending day. It was to answer questions about nature and information on Earth's objects.
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  This was a no man mission, it was a study of the sun and its rays