The catalog of known worlds beyond our solar system has crossed another threshold. NASA’s official tally now exceeds 6,000 confirmed exoplanets, a figure that has continued climbing on a rolling basis ...

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying long-standing theories of planet formation. The finding hints that some ...

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of ...

Astronomers now estimate there is at least one planet for every star in our galaxy. These worlds, called exoplanets, are planets that orbit stars outside our solar system. But new research from ...

Add Yahoo as a preferred source to see more of our stories on Google. (Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else we ...

Astronomers have observed two planets forming in the disk around a young star named WISPIT 2. Having previously detected one planet, the team has now employed European Southern Observatory (ESO) ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Scientists may have found one of the main sources of rocky material for the solar system, forming diverse populations of baby planets over millions of years. In a recent study published in The ...