Biggest asteroid in 35 years swings close to Earth

This image made from radar data obtained on Nov. 7, 2011 at 11:45 a.m. PST (2:45 p.m. EST/1945 UTC) and provided by NASA shows asteroid 2005 YU55 when the space rock was at 3.6 lunar distances, which is about 860,000 miles, or 1.38 million kilometers, from Earth. The asteroid the size of an aircraft carrier is set to make a close but harmless swing by Earth on Tuesday, Nov. 8, 2011. Scientists at NASA's Near-Earth Object Program, which tracks asteroids and comets, ruled out any chance of impact. (AP Photo/NASA/JPL-Caltech)

November 9, 2011 9:53:42 AM PST
An asteroid as big as an aircraft carrier zipped by Earth on Tuesday in the closest encounter by such a massive space rock in more than three decades.