A giant cliff collapse on a comet reveals pristine ice beneath the surface

The latest from Rosetta's smashing mission ESA/Rosetta/NavCam – CC BY-SA IGO 3.0. Dust trail from Aswan cliff collapse on Comet 67P The white arrow is pointing to the particles launched into space from the collapsing cliff on the comet's surface. One percent of the mass of the cliff was lost to space in the fall. On…