Bigger Than Expected Asteroid

The asteroid 2012 LZ1, which came within 3.3 million miles of Earth on June 14, turns out to be bigger than originally thought.  Astronomers at the Arecibo Observatory in Puerto Rico used radar to measure the asteroid during its close approach and determined it to be 0.6 miles across at its widest.

That's well short of the size of the dreaded Doomsday Rock, but its plenty big enough to create horrific damage if it struck Earth.  Happily, Arecibo was also able to refine the asteroid's orbit and determine there's no danger of such a collision for at least the next 750 years.