Astronomers just discovered three planets, two of which are roughly the size of Earth, orbiting a dim nearby dwarf star. Their proximity makes their atmospheres ripe for observing.
Astronomers have found seven Earth-sized planets around a cool red dwarf, all of which have the potential for liquid surface water.
The star with seven exoplanets puts out enough high-energy radiation to tear away the inner planets’ atmospheres in a few billion years.
Astronomers have confirmed the existence of the seventh planet around the ultracool dwarf star TRAPPIST-1.