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 ...

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth's, but are much denser on ...

Skygazers, mark your calendars because one of the coolest celestial events is coming around again toward the end of February.

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp. One of ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. For five consecutive mornings, beginning on Aug. 17, early ...

An international team of researchers has just revealed the existence of three Earth-sized planets in the binary stellar system TOI-2267 located about 190 light-years away. This discovery, published in ...