Asteroid 2024 YR4 will not hit Earth, but it has forced planetary defense experts to confront a different kind of worst case: ...

New observations show that asteroid 1998 KY26 is a mere 11 meters across and spinning twice as fast as previously thought.

An 1,100-foot asteroid named Apophis will pass Earth in 2029 closer than our satellites, with gravity potentially shifting ...

At this point in history, astronomers and engineers who grew up watching "Deep Impact" and "Armageddon," two movies about the ...