Jess Thomson is a Newsweek Science Reporter based in London UK ... coming closer than the moon. Stock image of an asteroid passing the Earth (main) and a school bus (inset).

DW flew about 139,000 miles (224,000 km) away from Earth. The space rock was estimated to be about 43 feet wide (13 m). Credit: Space.com | animation: NASA/JPL-Caltech | edited by Steve Spaleta Music: ...