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Lucy

NASA announces two missions to study early solar system

WASHINGTON: The US space agency NASA on Wednesday announced two unmanned missions to asteroids designed to study one of the earliest eras in the history of the solar system. They have been dubbed Lucy and Psyche, and NASA hopes to launch them in 2021 and 2023, respectively. The period NASA wants to learn more about is an era less than 10 million years after the birth of the sun. The Lucy mission -- named for a famous, critical hominin fossil set found in Ethiopia in 1974 -- will involve sending a robotic spacecraft…