See asteroid Dimorphous, pre- and post-impact, in this time-lapse of Hubble Space Telescope imagery. The space rock was ...

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

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

Potential impactors are most likely to have low velocities and the highest likelihood of hitting Earth during the winter.

To our best of our understanding, the Moon formed from Earth following a colossal impact. A Mars-sized world we nicknamed ...