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Solar System Exploration at 50
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Countdown: 20 to 11
50th Greatest Moments in Solar System Exploration
Countdown 50 to 41 40 to 31 30 to 21 20 to 11 10 to 1
The Best of the Best
Five decades of amazing solar system exploration began in December 1962 when Mariner 2 flew past Venus, the first successful mission to another planet. We asked you - and our own experts - to pick favorite moments from the last 50 years. The results are in. We'll roll out a new batch of polling results ten at a time from August through December 2012.
Browse the galleries above to learn more about key moments in solar system exploration. Visit our experts' gallery to see the favorite moments of some NASA scientists and engineers. Check our news pages to see what's happening now and our decadal survey site to see where we're headed in the coming decade (starting with Curiosity's spectacular Mars landing after our polls closed).
Eyes on the Solar System: Explore our galactic neighborhood in 3D! Solar System @ 50 Symposium: Watch the results Be sure to visit:

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