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 ...

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

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

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

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.

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

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

For much of January and February, you have the chance to see six planets in our solar system after dark, although two — Uranus and Neptune — will be hard to see without a telescope or high-powered ...

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