Mysterious minimoon circling Earth is actually a 1960s rocket booster

A mysterious minimoon temporarily orbiting Earth isn’t a chunky space rock, but a 1960s rocket booster, NASA reported Wednesday (Dec. 2). Researchers had an inkling that the minimoon might be human-made, but it wasn’t until this week that they confirmed it, after analyzing its composition from afar at NASA’s Infrared Telescope Facility (IRTF).  In fact, […]