The ability to detect ocean glint on other worlds could be invaluable in the search for life.

Dust made up of similar stuff as the Earth has been found in and around a handful of dead stars. The dust, which was left behind when the stars chewed up errant asteroids, suggests terrestrial planets ...

For generations, artists and science-fiction writers have imagined alien landscapes beneath twin sunsets. The image became iconic in popular culture long before astronomers confirmed that planets ...

A rocky world orbiting within its star’s habitable zone may be surrounded by a helium-rich atmosphere, providing the strongest evidence yet that planets with Earth-like conditions could support life ...