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At Space Launch Complex 3 at Vandenberg Air Force Base in California, a boattail fairing is mated atop a United Launch Alliance (ULA) Centaur upper stage. The boattail is an adaptor providing an interface between the Centaur and the payload fairing encapsulating NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, or InSight, spacecraft. A ULA Atlas V rocket is scheduled to liftoff on May 5, 2018, launching InSight the first mission to explore the deep interior of Mars. It will investigate processes that shaped the rocky planets of the inner solar system including Earth