NASA’s Osiris-Rex spacecraft leaves a mess on asteroid while making its return to Earth

A depression is visible where Osiris-Rex penetrated the asteroid’s surface. Boulders were hurled by the pressurised nitrogen gas that was fired at the ground to churn up material for vacuuming, and by the spacecraft’s getaway thruster.

from http://www.firstpost.com/tech/science/nasas-osiris-rex-spacecraft-leaves-a-mess-on-asteroid-while-making-its-return-to-earth-9535181.html