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“Pluto has strong atmospheric cycles: it snows on the surface;…” quote by Alan Stern — Download Open image

“Pluto has strong atmospheric cycles: it snows on the surface; the snows sublimate and go back into the atmosphere each 248 year orbit.”

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More by Alan Stern

Competition-driven innovation and price pressure that commercial practices foster can only make human spaceflight ever more common and U.S. leadership in this domain ever…

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Why would you listen to an astronomer about a planet?

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When we first sent missions to Jupiter, no one expected to find moons that would have active volcanoes. And I could go down a…

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Pluto is still active four and a half billion years into its history. It was expected that small planets like Pluto would cool off…

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The Kuiper Belt is the largest mapped structure in our planetary system, three times as big as all the territory from the sun out…

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