Harmless Zip By Earth

An asteroid the size of an aircraft carrier is set to make a close but harmless swing by Earth on Tuesday. Scientists at NASA's Near-Earth Object Program, which tracks asteroids and comets, ruled out any chance of impact. They're using the close encounter to learn more about the space rock known as 2005 YU55.

An asteroid the size of an aircraft carrier is set to make a close but harmless swing by Earth on Tuesday. Scientists at NASA's Near-Earth Object Program, which tracks asteroids and comets, ruled out any chance of impact. They're using the close encounter to learn more about the space rock known as 2005 YU55.