Choose your fighter for the origin of water on Earth! Was it always here or did it come to this planet from somewhere else in space? And, either... Comets, asteroids, and planets: The likely origins ...

Where do Earth's oceans come from? The debate on whether water may have been originally delivered to our planet by comets striking its surface has reopened after a new groundbreaking study. Published ...

Dear EarthTalk: It seems to me the single biggest potential “environmental” problem we could face—even bigger than global warming or a nuclear war—is a comet or asteroid striking the Earth. Do we ...

The article introduces "dark comets," a newly identified class of celestial bodies exhibiting nongravitational acceleration characteristic of comets but lacking visible dusty tails, unlike typical ...

NPR's Ailsa Chang speaks to astronomer Sarah Greenstreet about her team's new discovery of the fastest-spinning large asteroid known to man.

It was long thought, up until recently, that asteroids and comets delivered Earth's oceans during the very early Solar System ...

Our solar system contains planets, dwarf planets, asteroids and comets — but only one world is known to harbor life. Scientists have long debated whether Earth is truly unique. Perhaps our planet just ...

Comets are famous for having space tails. But they're not the only ones! Asteroids, planets, and even stars can rock tails of their own. Hosted by: Stefan Chin (he/him) Huge thanks go to the following ...

Asteroids, comets, and meteors differ in origin and behavior—remnants of our Solar System that sometimes create dazzling ...

Cold cosmic dust grains can link amino acids into protein‑like chains in deep space, suggesting life’s chemistry may begin ...