Pluto’s Largest Moon Looks Young

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When the New Horizons space probe captured images of Pluto and its large moon Charon as it flew by in 2015, conventional scientists were surprised by the small number of craters in Charon’s southern hemisphere.1 This suggested a relatively young surface, despite Charon’s presumed age of over four billion years. How could they account for this?

Theorists proposed that a subsurface ocean developed on… More…

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