We’ve discovered thousands of exoplanets — but not a single confirmed exomoon. That doesn’t mean they aren’t out there. In ...

Free-floating planets, or as they are more commonly known, rogue planets, wander interstellar space completely alone. Saying there might be a lot of them is a bit of an understatement. Recent ...

Alien life could exist on hot, rocky planets, sustained not by water but by a type of salty fluid, new research suggests. Reading time 3 minutes The search for alien life usually hinges on finding the ...

A team of U.S. and U.K. researchers has outlined a new way to detectalien moons by tracking subtle flashes of reflected light during lunar eclipses in distant planetary systems. The method, designed ...

For the first time, scientists have directly detected molecules in a Frisbee of gas and dust swirling around an alien gas-giant planet. “I didn’t think this was possible,” says astronomer Sierra Grant ...