NASA launches mission to explore Solar System 'fossils'
 

One of the more important missions to study the early Solar System is now underway. NASA has launched Lucy, a robotic spacecraft that will be the agency's first to explore the Trojan asteroids trapped near Jupiter's Lagrange points. They're considered "fossils" of planetary formation that will help understand the Solar System's evolution, much as Lucy the australopithecus helped humans understand their ancestors.

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