will pass by Earth at about half the distance between us and the moon this weekend. There's no need to worry, though. While the newly discovered near-Earth Asteroid 2018 RC will make a relatively close pass by our planet, it will still safely clear the neighborhood with no chance of a collision. The University of Hawaii's Asteroid Terrestrial-impact Last Alert System (ATLAS) first spotted the asteroid on Monday, and it's estimated to measure up to 233 feet (71 meters) in diameter. That's the same height as the 17-story will pass by Earth at about half the distance between us and...