A discarded Falcon 9 rocket will collide with the moon at 5,400 miles per hour.
A roughly five-ton piece of a SpaceX rocket that sent two lunar landers to the moon is about to join them, but not on purpose.
On Aug. 5 at around 2:34 a.m. ET, the upper stage of a discarded Falcon 9 rocket will collide with the moon at 5,400 miles ... [4208 chars]