NASA snaps asteroid as it approaches Earth

NASA's Deep Space Network antenna has captured new radar images of Asteroid 2005 YU55 as it approaches Earth in what's set to be the closest approach of a big asteroid ever recorded.

Scientists ready to study Earth-buzzing asteroid

Imagine looking up into the sky and seeing a giant asteroid the size of an aircraft carrier. Scary, eh? But don't worry, because although scientists predict the fly-by will happen this fall, they aren't concerned about a possible collision.