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Follow the mission of the Rosetta spacecraft as it traveled to Comet 67P/Churyumov-Gerasimenko and sent back the most detailed data ever collected about a comet. The mission ended in 2016, but you can relive it here!
Join the Exploratorium as we follow the continuing stories of NASA's Hubble Space Telescope.
Transits of Venus—the movement of Venus across the face of the sun—occur in pairs that are eight years apart and then don’t happen again for more than a hundred years.
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