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Ball Aerospace technicians at Astrotech in Titusville, Fla., begin lifting the high-gain communications antenna to attach it to an overhead crane. The antenna will be installed on the Deep Impact spacecraft. A NASA Discovery mission, Deep Impact will probe beneath the surface of Comet Tempel 1 on July 4, 2005, when the comet is 83 million miles from Earth, and reveal the secrets of its interior. During the encounter phase, the high-gain antenna transmits near-real- time images of the impact back to Earth. The spacecraft is scheduled to launch Jan. 8 aboard a Boeing Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station, Fla.