which is thought to be due to a collision with a smaller asteroid. When astronomers first spotted the unusual X shape, they assumed that they were observing the immediate aftermath of an impact.

The space agency defied incredible odds to get its asteroid-hunting OSIRIS-REx spacecraft off the ground. Since then, the ...

A trail of debris from the asteroid struck by a Nasa spacecraft ... we were able to capture the structure and extent of the aftermath in the days following the impact," said Teddy Kareta, an ...