LeoLabs reported that the two satellites came within a mere 66 feet (20 meters) of each other. Considering the speed at which these objects travel–over 17,500 miles per hour (28,165 kilometers p ...

Around 100 years ago, many Americans got their entertainment from watching two steam engines crash into each other.

When two objects collide the total momentum before the collision is equal to the total momentum after the collision (in the absence of external forces). This is the law of conservation of momentum.

Consider two objects orbiting each other ... toward each other mean that the Milky Way and Andromeda will eventually collide, ...