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KENNEDY SPACE CENTER, FLA. - Inside the mobile service tower on Launch Pad 17-B at Cape Canaveral Air Force Station, workers help guide the upper segement of the transportation canister away from the STEREO spacecraft. STEREO is being prepared for launch, scheduled for Oct. 25. STEREO stands for Solar Terrestrial Relations Observatory and comprises two spacecraft that will launch in a piggyback mode, separating after reaching the appropriate orbit. The STEREO mission is the first to take measurements of the sun and solar wind in 3-dimension. This new view will improve our understanding of space weather and its impact on the Earth. The STEREO mission is managed by Goddard. The Applied Physics Laboratory designed and built the spacecraft. The laboratory will maintain command and control of the observatories throughout the mission, while NASA tracks and receives the data, determines the orbit of the satellites, and coordinates the science results. Photo credit: NASA/Jim Grossmann