8 asteroids in our solar system
Thu, May 24, 2012 at 7:18 PM
Will an asteroid ever slam into our planet, destroying life as we know it? Once every million years or so, a big asteroid collides with the Earth, threatening all life — but that's not what you should be worried about. NASA tracks and “characterizes” objects that may potentially harm our planet with its Near-Earth Object Observations Program, also known as Spaceguard. We’ve compiled several images from NASA and elsewhere of notable neighboring asteroids.