Rocky and Water-Rich Asteroid (IMAGE) University of Warwick Caption This is an artist 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 the Solar System likely delivered the bulk of water on Earth and represent the building blocks of the terrestrial planets. Credit Image copyright Mark A. Garlick, space-art.co.uk, University of Warwick and University of Cambridge Usage Restrictions Image copyright Mark A. Garlick, space-art.co.uk, University of Warwick and University of Cambridge License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.