A SpaceX rocket will collide with the moon Wednesday. While Earth is safe, studying the impact could protect future lunar astronauts.

The stream of ejected material could stretch for several miles into space and remain visible to telescopes for tens of minutes.

A drifting SpaceX rocket stage will crash into the Moon, creating a significant crater and dust plume.

Abandoned spacecraft will hit with the force of three tons of TNT and leave behind a hole in the lunar surface