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

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