'Spooky' Halloween Asteroid May Actually Be a Comet

The big asteroid that will zoom past Earth on Halloween may actually be a comet, NASA researchers say. The roughly 1,300-foot-wide (400 meters) asteroid 2015 TB145, which some astronomers have dubbed "Spooky," will cruise within 300,000 miles (480,000 kilometers) of Earth on Halloween (Oct. 31) — just 1.3 times the average distance between our planet and the moon. Though 2015 TB145 poses no threat on this pass, the flyby will mark the closest encounter with such a big space rock until Augu