In this image taken by the New Horizons spacecraft on 14 July 2015, in which Pluto is illuminated from behind, the bluish haze around the dwarf planet is visible. Scientists suspect Pluto may have particles of frozen organic matter in its atmosphere. (Photo: NASA,...
Mercury North Pole with yellow marked water ice deposits. (Photo: NASA/ MESSENGER) It seems almost paradoxical: there is water ice on Mercury, which is heated by the nearby sun. This ice remains in the deep permanent shadow of some polar craters. Until now, meteorite...
