We've discovered a lot of new planets in the last few years, but this is the first one that seems to have no star to orbit.
Don't get too excited about those organisms that supposedly came from space. An expert's already saying not so fast.
Looks like we're about to get one step closer to finding life on other worlds.
We've known they've existed for a while, but this is the first time we've ever seen one.
Looks like one of Jupiter's moons could be the next great frontier in the search for extraterrestrial life.
Star Trek fans seem to be making their voice heard in a contest to name one of Pluto's recently discovered moons.
Supernovas are among the most powerful astronomical phenomena in the universe, but we've never been able to predict when they'll happen...until now.
When we think about what could go wrong when we make first contact with an alien race, the first thing that usually comes to mind is total planetary destruction.
We may not be headed for a Deep Impact-style global disaster yet, but this month an asteroid will come very, very, scarily close to hitting us.
Earth is pretty good at supporting life, but according to a new estimate of what constitues a planetary "habitable zone," it looks like our planet (and perhaps many others) is only barely in the right place.