In a few days, sky watchers in Eastern Europe, Asia, and Australia will get a chance to see one big rock hurtling through the heavens. One very big rock. Compared with other asteroids traveling through space, this one may seem a relative pebble -- at half the size of a football field -- but for Earth, it will make for a relatively close call.
"This is a record-setting close approach," says Don Yeomans of NASA's Near Earth Object Program at JPL. "Since regular sky surveys began in the 1990s, we've never seen an object this big get so close to Earth." … Read more