This image obtained from NASA shows four Hubble Space Telescope images, taken over a five-month period, from January to May 2010 with Wide Field Camera 3, depicting the odd-shaped debris that likely came from a collision between two asteroids. The 400-foot-wide (122 meters) object in the image is thought to be a remnant of a larger body that collided at about 11,000 miles per hour (17,700 kilometers per hour) with a smaller rock that the scientists think measured 10 to 15 feet across. The crash released an explosion with the force of a small atomic bomb and is believed by astronomer David Jewitt of the University of California, Los Angeles, to have happened in February or March 2009.