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How Mir's gyrodynes work
Up to a dozen gyrodynes work to stabilize Mir as it orbits the Earth. The spinning devices, similar to oversized gyroscopes, generate angular momentum that maintains Mir's orientation toward the sun, which is essential for its solar panels to absorb energy needed to keep the space station operating.
This electrically operated equipment requires a huge surge of electricity to start. However, once the gyrodynes are set in motion they can keep spinning for some time with minimal energy consumption.
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