Far beyond the reach of any probe, astronomers have found a gas giant whose atmosphere behaves less like a familiar planet and more like a special effect from a big-budget space epic. Orbiting a ...

Image an alien planet where savage winds rip through the atmosphere carrying molten iron and titanium particles. Such a planet actually exists. Known as WASP-121b, this exoplanet is located 900 ...

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But not everyone agrees that it signals life. An illustration shows what ...