UARS Falls To Earth...... Somewhere

You'd think, with all NASA's assets, tracking a 6-ton satellite through a fiery re-entry all the way to the surface wouldn't be a particular challenge. Apparently, you'd be wrong.

NASA knows its giant UARS satellite fell to Earth because it's clearly no longer in space, but the space agency doesn't know exactly where it fell. The best estimate is somewhere in the Pacific, short of the North American coast. That estimate is partly based on the fact that there have been no reports of any debris crashing on land-- therefore, it crashed into the ocean. NASA says it may never know where the pieces of UARS that made it to the surface actually came down.