Photos:

Gallery: The Smallest Alien Planets

PREVIOUS | NEXT
1 of 20

Three Smallest Alien Planets Discovered

Credit: NASA/JPL-Caltech
This artist's concept depicts the newfound planetary system KOI-961, which contains three alien planets smaller than Earth. The exoplanets circle their…Read More »





red-dwaf host star at very close distances, so they're likely too hot to host life. [Full Story]   Less «
More from Space.com