Scientists have traced a series of mysterious radio signals to a gigantic alien world 63 light-years from Earth.

Astronomers have found evidence that water clouds on WISE 0855, an alien world roughly 7.5 light-years from Earth, vary in ...

For decades, scientists have searched the universe for signs of life beyond Earth. While distant exoplanets often grab the headlines, one of the most promising places may be much closer than we think.

The science fiction genre is home to many fascinating, terrifying, and breathtaking worlds that stretch the limits of imagination, from the hive of scum and villainy that is Tatooine in Star Wars to ...

This artistic illustration of the Pink Planet, or GJ504b, orbiting its host star. Astronomers think the object is pink because it's incredibly old (between 2.5 billion and 4 billion years old) and ...