asteroid

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new study hints.

The dinosaurs were not in decline before the asteroid hit, a new study finds. Instead, poor fossilization conditions and unexposed late Cretaceous rock layers mean they're either not preserved or hard to find.

NASA has released the Lucy spacecraft's first close-up images of asteroid Donaldjohanson, revealing a peanut-shaped rock that could shed light on how planets formed in our solar system.

The once-dubbed "city-killer" asteroid 2024 YR4 has surprised scientists with its 'unusual' shape as it rapidly rotates through space on a trajectory that could see it hit the moon.

The hefty space rock 2014 TN17 is large enough to wipe out a city, but it will pose no risk to our planet when it sails by this Wednesday (March 26). Researchers will monitor it carefully during its close approach.

Buried "megaripples" — some the size of five-story buildings — are helping scientists piece together the devastation following the impact that wiped out the nonavian dinosaurs.

The likelihood of asteroid 2024 YR4 hitting Earth in 2032 rose and fell last week. NASA's impact odds are now so slim that the asteroid is no longer a hazard on the Torino asteroid scale.

Nonavian dinosaurs have been extinct for 66 million years, but what would have happened if they'd survived?

The world is watching as NASA tweaks the odds that asteroid 2024 YR4 will hit Earth. But how threatening is YR4, and how does it compare to other potentially hazardous space rocks?

NASA has been changing the odds of asteroid 2024 YR4 hitting Earth in recent days, but the latest shift significantly downgrades the asteroid's threat level and makes a moon strike more likely.