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first to reach planet, reveals temperature http://solarsystem.nasa.gov/
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Soviet craft, sends 23 minutes of data from surface of Venus. First to land on the planet http://solarsystem.nasa.gov/
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first flyby of Mercury. Launched in Nov. 3 1973 http://solarsystem.nasa.gov/
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first flyby of Venus http://solarsystem.nasa.gov/
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discovered Jupiter's rings http://solarsystem.nasa.gov/
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discovered that Saturn's rings are mostly water and ice http://solarsystem.nasa.gov/
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During its flyby, discoveres 10 moons and an additional 2 rings http://solarsystem.nasa.gov/
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During flyby, tracked the Great Dark Spot and observed clouds http://solarsystem.nasa.gov/
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Orbits Venus http://solarsystem.nasa.gov/
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dropped probe into Jupiter's atmosphere, studied composition http://solarsystem.nasa.gov/
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Orbited the planet, dectected hydrogen rich polar deposits http://solarsystem.nasa.gov/
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European Space Agency. Studies atmosphere and plasma environment http://solarsystem.nasa.gov/
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Found that rings pile up in ridges more than 3km tall. Still in orbit htto://solarsystem.nasa.gov/
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first to orbit Mercury. Launched Aug. 3 2004 http://solarsystem.nasa.gov/
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Large land rover preparing for launch. Will invesigate possible microbial life conditions and search for clues of past life. http://solarsystem.nasa.gov/
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