WASHINGTON (Reuters) - They are the most common type of planet observed in our Milky Way galaxy - two to three times the diameter of Earth but smaller than Neptune, and orbiting closer to their stars ...

That raises the possibility that the TRAPPIST-1e exoplanet could also have liquid water and therefore support life.

NEW YORK — A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an unusual ...

Located about 120 light years away, the exoplanet appears to take an unusual path around two brown dwarfs, whipping around at a right angle. Brown dwarfs are sometimes called failed stars because they ...