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 ...

Nearly two dozen ‘Earth-like’ planets that could be crawling with alien life have been identified by scientists. Exoplanets are what scientists call worlds that orbit other stars (though some are ...

A NASA telescope in early development should be able to detect light bouncing off the surface of oceans on alien planets, vital information in the hunt for alien life. The Habitable Worlds Observatory ...