Scientists Find Evidence of an Ocean Deep Inside Pluto
Reddish deposits of ammonia on Pluto suggest that liquid water, the key to life as we know it, exists below its surface.
Proxima B May Not Be Such a Great Second Home For Humanity After All
Unless you like radiation blasts to the face.
Saturn’s Cassini Orbiter (1982-2017)
On Friday, Cassini will vaporize itself in Saturn's skies.
Who Needs a Sun? Alien Life Could Survive Off of Cosmic Rays
We might not need to look for a “Goldilocks” planet after all.