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).