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The Space Infrared Telescope Facility (SIRTF) arrives at Building AE from the Lockheed Martin plant in Sunnyvale, Calif., to begin final preparations for its launch aboard a Delta II rocket. SIRTF will obtain images and spectra by detecting the infrared energy, or heat, radiated by objects in space. Most of this infrared radiation is blocked by the Earth's atmosphere and cannot be observed from the ground. Consisting of an 0.85-meter telescope and three cryogenically cooled science instruments, SIRTF is one of NASA's largest infrared telescopes to be launched. SIRTF is scheduled for launch from Launch Complex 17-B, Cape Canaveral Air Force Station.