NASA's Lucy spacecraft is about to have its second close encounter with an asteroid

A NASA spacecraft will make a close approach to an asteroid in the main belt on Sunday afternoon, in the second of several asteroid flybys planned for its 12-year mission to study remnants of the early solar system. The Lucy spacecraft will be 596 miles (960 km) from asteroid Donaldjohanson -- named after the paleoanthropologist who discovered the "Lucy" hominin fossil -- at the closest point of its pass, which will occur at 1:51PM ET, according to NASA. Lucy will use three instruments to captur...