Soil Mapping Spacecraft Ready for Flight

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NASA’s Soil Moisture Active Passive (SMAP) spacecraft will be boosted into orbit aboard a United Launch Alliance Delta II rocket from Vandenberg Air Force Base in California. Learn how SMAP and the Delta II were readied for liftoff.
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How does the body of the spacecraft not rotate opposite of the spinning instrument on top? Does it use gyroscopes?

philipstuckey