Science, Maths & Technology
What do the latest pictures of Pluto tell us?
...system. Did tar particles from Pluto’s atmosphere somehow make it across to Charon? Elsewhere there are plenty of impact craters, though probably fewer than on Pluto’s water-ice terrains, which poses a problem of why and how Charon has been resurfaced more recently than much of Pluto. Maybe there is some twist to the tidal-heating interaction between Pluto and Charon...