635 light-years from where you are sitting, way out in outer space, lies a planet. The first planet to be discovered inside ...

Kepler-22b is one of the most famous exoplanets ever discovered, a super-Earth sitting in the habitable zone of its star, 600 light-years away. But what would actually happen if humanity somehow ...

But a group of experts now says that looking for life on water–rich planets could be a waste of time. Instead, they claim we ...

This weekend, six planets are set to share the sky in a rare “planet parade,” giving stargazers a short but magical window to ...

Jupiter, Mercury, Neptune, Saturn, Uranus, and Venus—will appear in the sky together in a special planet parade on Feb. 28.

The current image of Mars as an arid and hostile desert contrasts sharply with the history revealed by its surface. Channels, ...