A newly discovered asteroid will zip close by Earth Thursday, but poses no threat of crashing into our planet even though it is passing within the orbit of the moon.... A newly discovered asteroid will zip close by Earth Thursday, but poses no threat of crashing into our planet even though it is passing within the orbit of the moon. The asteroid, called 2010 GA6, is a relatively small space rock about 71 feet wide and was discovered by astronomers with the Catalina Sky Survey in Tucson, Az. The space rock will fly within the orbit of the moon when...