Scientists have discovered seven more "dark comets," and analysis of this haul suggests that the puzzling planetoids are ...

The rocky bodies, which look like asteroids but act like comets, could comprise up to 60% of near-Earth objects.

One of the best meteor showers of the year is about to peak. Here's how to watch and where you can catch the Geminids.

A reanalysis of the data from the "rubber-ducky" comet 67P, collected nearly a decade ago, suggests comets may have deposited a lot more water on Earth than scientists previously thought.

How do you find a comet that could pose a threat to Earth but hasn't passed our planet in the last 200 years or more? You ...

Water. All life on Earth requires it in some way or another, and it's hard to miss that roughly 70% of our planet's surface ...

The rings of Jupiter might not be as spectacular as Saturn’s (whose are?) but they are there. However, one of them may not ...

NASA researchers have discovered seven new dark comets, asteroids that act like comets, and they say there could be even more ...

The water on Earth might have been delivered from space by comets billions of years ago - NASA scientists say Jupiter-family ...

New research on Comet 67P indicates that its water may be similar to Earth's, contradicting earlier findings by Rosetta's ...

NASA has announced the discovery of seven astronomical objects that come in two flavors; they look like asteroids but ...

At least eight comets will be visible in the Northern Hemisphere in 2025. Here's where and when to look and which ones you ...