Fear not: the asteroid, named 7335 (1989 JA), will soundly miss our planet by about 2.5 million miles (4 million kilometers) — or nearly 10 times the average distance between Earth and the moon. Still, given the space rock's enormous size (1.1. miles, or 1.8 km, in diameter) and relatively close proximity to Earth, NASA has classified the asteroid as "potentially hazardous," meaning it could do enormous damage to our planet if its orbit ever changes and the rock impacts Earth. This asteroid is one of more than 29,000 near-Earth objects (NEOs) that NASA tracks each year. NEOs refer to...