lucy spacecraft

How scientists spotted 9th target for NASA’s Lucy asteroid mission

NASA’s asteroid-touring mission has picked up a ninth target.

In preparation for the lucy mission to explore a distant class of asteroids called the Trojans, astronomers have been monitoring the targeted space rocks. One day in March, mission personnel gathered 26 different teams from around the world to watch one of those asteroids17-mile-wide (27 kilometers) Polymele, appear to pass in front of a star in what scientists call an occultation.

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