This is an artist's impression of a rocky and water-rich asteroid being torn apart by the strong gravity of the white dwarf star GD 61. Similar objects in our solar system likely delivered the bulk of water on Earth and represent the building blocks of the terrestrial planets.
More information: www.spacetelescope.org/images/opo1338a/
NASA, ESA, M.A. Garlick (space-art.co.uk), University of Warwick, and University of Cambridge.