The shockwave from the Chelyabinsk meteor circled the Earth -- twice!

You know an explosion is powerful when an explosion requires a team of researchers who normally look for illicit nuclear bomb tests shift to study it. And yes, the group's results show that the Russian meteor created a big boom indeed. » 6/28/13 12:20pm 6/28/13 12:20pm

We now know the origin of Russia's meteor

The Chelyabinsk meteor may have snuck up on us by surprise, but it didn't take long for a crack team of astronomers from Colombia to figure out where the damned thing came from and the path it took to get here. By sifting through the copious amounts of video footage available, and after performing some clever… » 2/26/13 11:00am 2/26/13 11:00am

NASA releases first video of Asteroid DA14's close encounter with Earth

NASA has released the first video observation of asteroid DA14's record-setting flyby of Earth. The 45-meter-wide space rock sped past last Friday, coming at one point within 17,200 miles of the planet's surface. That may seem like a wide berth (especially in light of the unanticipated arrival of the 17-meter-wide… » 2/20/13 12:54pm 2/20/13 12:54pm