Life could have the time and energy to arise and prosper on Earth-like worlds in the rapidly shrinking "Goldilocks zones" ...

First identified in 1916 by astrophotographer Edward Emerson Barnard, Barnard’s Star has long intrigued scientists. This latest discovery sheds light on the tiny worlds circling it and raises hopes ...

So in some sense, alien worlds were not first discovered in the 1990s or even the 1980s. It took nearly a century to fully ...

Scientists have been receiving X-ray signals from the Helix Nebula for decades, but now they believe it may hide a horrifying ...

A surprising chemical difference between Pluto and Sedna, another dwarf planet in the distant Kuiper Belt ... They verified ...

A decades-old cosmic mystery may finally be solved. Scientists now suspect that the strange X-ray glow from a distant white dwarf is the result of a planet being ripped apart and devoured by the dying ...

Each of the planets, labeled b, c, d, and e, has a mass between 20% and 30% of Earth's, making them among the smallest yet ...