Science, Maths & Technology
What do the latest pictures of Pluto tell us?
...world. New Horizons found no trace of an atmosphere and the surface is mostly water-ice but it boasts the only dark polar cap in the solar 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...