by Qasim Nauman SEOUL, South Korea (AFP) — The largest asteroid to pass by Earth this year has made its closest approach, posing no threat of a cataclysmic collision but giving astronomers a rare chance to study a rock formed during the beginning of our solar system. The asteroid was two million kilometers (1.25 million miles) away at its nearest, according to NASA — more than five times the distance between the Earth and the […]