Asteroid

An asteroid wider than two professional football fields is set to fly safely past Earth on Sept. 14, according to NASA's Center for Near-Earth Object Studies.

The space rock, known as asteroid 2020 QL2, is more than 120 meters (393 feet) in diameter, the government agency notes. It is expected to fly past Earth at a speed of nearly 24,000 mph and come within a distance of 4.2 million miles.

By comparison, the moon is 238,900 miles from the Earth.