Beyond our solar system, countless alien worlds of lava, ice, water and noxious gas swirl through the cosmos. Here are some ...

Are there planets beyond Earth where humans can live? The answer is maybe, according to physicists examining F-type star systems.

Astronomers have discovered an exoplanet orbiting Barnard's star, the closest single star to our Sun. On this newly discovered exoplanet, which has at least half the mass of Venus, a year lasts just ...

The comet will likely be difficult to see with the naked eye, so plan to use binoculars or a telescope. For your best shot at ...