NASA weighs in: Meteor over St. Louis was a basketball-sized piece of asteroid

ST. LOUIS — By 9 p.m. Monday night the videos were already spreading online: a meteor streaking through the sky behind the Gateway Arch. The same fireball caught on security cameras blazing over suburban homes. A sonic boom heard for miles.

By the next morning, a team of NASA experts had the answers on what that meteor, aka “Event: 20191112-025148,” turned out to be.