NASA is set on Saturday to launch a first-of-its kind mission, dubbed Lucy, to study Jupiter's Trojan asteroids, two large clusters of space rocks that scientists believe are remnants of primordial material that formed the solar system's outer planets.
If all goes according to plan, Lucy will be hurled into space on a 12-year expedition to study a record number of asteroids. It will be the first to explore the Trojans, thousands of rocky objects orbiting the sun in two swarms - one ahead of the path of giant gas planet Jupiter and one behind it.
Scientists hope Lucy's close-up fly-by of seven Trojans will yield new clues to how the solar system's planets came to be formed some 4.5 billion years ago and what shaped their present configuration. "The Trojan asteroids are leftovers from the early days of our solar system, effectively the fossils of planet formation," principal mission investigator Harold Levison of the Southwest Research Institute in Boulder, Colorado, was quoted by NASA as saying.
As well as the Trojans, Lucy will do a fly-by of an asteroid in the solar system's main asteroid belt, called DonaldJohanson in honor of the lead discoverer of the fossilized human ancestor known as Lucy, from which the NASA mission takes its name. The Lucy fossil, unearthed in Ethiopia in 1974, was in turn named for the Beatles hit "Lucy in the Sky with Diamonds."
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Dana Bolles | External Information Technology Lead – NASA Solar System Exploration
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