Astronomers using the James Webb Space Telescope have discovered that a distant alien planet's atmosphere is surprisingly lopsided. Located 1,300 light-years away, the scorching gas giant WASP-17b ...

A newly discovered baby planet has been identified as the youngest known exoplanet in the galaxy. Approximately one million years old, this unprecedented discovery represents the youngest alien world ...

Decades before blockbuster CGI aliens, artist Wayne Barlowe designed an entire ecosystem for his book "Expedition" — later turned into the Discovery Channel special "Alien Planet." Putin brings war ...