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Sputnik itself wasn't so much a data gathering device as it was an end in itself (proof of concept); being the first artificial satelite it was neither large (about 2 feet across) nor very sophisticated. It emitted a radio signal until the batteries ran out; without the capability of maintaining its orbit, it lost energy to atmospheric drag and burned up in re-entry about three months after it was deployed. Some information about the atmosphere could be deduced from the drag and its radio signal.

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11y ago

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