Astronomers Studying 'Super-Earth' Exoplanet Find A Bonus Planet

December 11, 2017

Scientists used to wonder how common planets were throughout the universe, and now we know. They’re extremely common. They’re so common, in fact, it’s possible just to find another one while you’re trying to gather data on the one you already knew about. That’s what happened when astronomers recently turned their attention to the star K2-18. They found a bonus planet.