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Charon’s red pole

15 September 2015
Astronomy, Biology

At http://phys.org/print361182218.html … surfaces vary in colour when something about them changes, due to composition and make-up (geology) and other differences (liquid and solid etc). The northern polar region of Charon, one of Pluto's companions, are much redder than the rest of it – but what is causing this?


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