22, 2032, triggering planetary defense groups at the United Nations. Bennu is a medium-sized asteroid. According to NASA, Bennu is about one-third of a mile (half a kilometer) wide at its equator.
NASA’s OSIRIS-REx mission uncovered a cosmic connection between asteroid Bennu and Earth’s Searles Lake. Both contain minerals formed by evaporating salty water, hinting that Bennu’s parent body once ...