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Astronomy Picture of Day: Shuttle Ferry
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Astronomy Picture of Day: Shuttle Ferry# Astronomy - 天文
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Shuttle Ferry
Credit: Carla Thomas, NASA
Explanation: How does a space shuttle that landed in California get back to Florida for its
next launch? The answer is by ferry. NASA operates two commercial Boeing 747 airplanes
modified to carry a space shuttle on their backs. Designated officially as Shuttle Carrier
Aircraft or SCA, the 747s were made for commercial flights but bolstered by NASA with
several struts, stabilizers, and electronic monitors. Spanning about 70 meters in
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