Pluto 'paints' its largest moon red
Wednesday, September 14, 2016 - 18:41
in Astronomy & Space
In June 2015, when the cameras on NASA's approaching New Horizons spacecraft first spotted the large reddish polar region on Pluto's largest moon, Charon, mission scientists knew two things: they'd never seen anything like it elsewhere in our solar system, and they couldn't wait to get the story behind it. Over the past year, the scientists think they've solved the mystery.