From HuffPo:

If what astronomers believe is correct, NASA's Hubble Space Telescope's Wide Field Camera 3 happened to be correctly oriented just as two asteroids slammed into each other 90 million miles away from the Earth.

Scientists are guessing the collision happened at speeds over 11,000 miles per hour, which is what scientists believe the average speed of asteroid collisions are. (see photo below)

It seems that only one asteroid, named P/2010 A2, survived the impact and is seen in the image glowing just outside of the X-debris pattern. It is assumed that the other asteroid disintegrated fully.

Picture moved under the jump because I get too picky about format every once in a while...