Oct. 8 (UPI) -- International space agencies say an asteroid zipped by Earth closer than a large number of satellites currently in orbit, but was not detected until hours later. The European Space Agency said Monday that a 3- to 10-foot-wide asteroid was picked up by radar last Wednesday some 265 miles above Earth over Antarctica, near Earth's most southern point, at an altitude similar to that of the International Space Station. "Tracking down a meter-scale object in the vast darkness of space