At the center of our galaxy is a black hole nine light-years wide and four million times more massive than our Sun. It's a monstrous astronomical creature that devours matter, and thanks to a very sophisticated telescope we've got a better picture of what that looks like.

The Mayan Apocalypse didn't happen last week, and we're all back to living our lives, but it turns out there's another opportunity for world-ending calamity on the horizon. There's an asteroid out there that could slam into our planet in 2040. But will it? NASA's got the answer.

Astronomers are finding potential new planets out in the cosmos all the time now, and though it seems more and more of those planets are turning out to possibly be habitable, they're all so far away that it seems humanity will never reach them. But now another possibly habitable planet has popped up, and though it's still far away, it's the closest one to our solar system we've ever seen.

Astronomers have long known that our solar system came of age during a violent time in our universe, but even they seem to have underestimated just how violent. Two NASA probes have just produced an extremely high definition "gravity map" of the Moon, and it reveals that the lunar crust was once torn to shreds by impacts.