Binzel recently created a 10-point scale for estimating the threat of a near-Earth asteroid, with zero indicating no chance of an Earth impact and 10 indicating a certain Earth impact with severe, global damage.
The world was already on edge in anticipation of the close-shave flyby of the near earth asteroid 2012 DA14, which was unexpectedly followed within the next 72 hours by two other separate fireballs over Northern California and parts of Florida.
It might sound like the plot of a Hollywood movie, but one gigantic asteroid is scheduled to come within 20, 000 miles of Earth in the near future -- a near miss in cosmic measurements -- and the possibility remains that it could hit our planet and cause catastrophic devastation never seen before.