The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

It took two years for NASA's OSIRIS-REx space probe to return from asteroid Bennu before dropping off a small capsule as it ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that ...

Samples of asteroid Bennu contain molecules that suggest the "conditions necessary for life" were widespread across the early ...

HWO will be the first space telescope built to find potentially habitable planets and analyze their atmospheres for signs of ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

NASA scientists found amino acids, key minerals, and nucleobases for DNA in samples from the OSIRIS-REx asteroid mission.

Samples from asteroid Bennu have delivered insights into the origins of Earth’s water and the organic molecules that may have ...

All forms of Earth life have specific chemicals in their makeup, such as amino acids and sugars. Scientists have known that ...

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

While claims of a “rare alignment” are overblown, you can still see up to six planets in the night sky this weekend. Here's ...