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CAPE CANAVERAL, Fla. – NASA's Kepler spacecraft, enclosed in a canister and protective cover, is ready to leave the Astrotech payload processing facility in Titusville, Fla. Kepler is being moved to Launch Pad 17-B at Cape Canaveral Air Force Station. The liftoff of Kepler aboard a Delta II rocket is currently targeted for 10:48 p.m. EST March 5 from Pad 17-B. Kepler is designed to survey more than 100,000 stars in our galaxy to determine the number of sun-like stars that have Earth-size and larger planets, including those that lie in a star's "habitable zone," a region where liquid water, an…