Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

When astronomers announced Kepler-452b, they were not just adding another distant world to a growing catalog. They were ...

Far beyond the eight familiar planets in our solar system, countless bizarre and extreme worlds await discovery — and some have already been found. Thanks to rapidly advancing telescope technology, ...

Mars just scored another point in favor of alien life. Scientists discovered signs of an ocean's worth of liquid water miles below Mars' surface. The findings, based on Marsquake measurements by ...

NASA's Chandra X-ray space telescope has created a 3-D map of nearby stars that may help astronomers search for alien planets with the potential for life. When you purchase through links on our site, ...

A layer of molten rock deep inside some rocky planets may be doing more than shaping their interiors. New research points to ...