"On July 6, 2016, engineers instructed NASA's Solar Dynamics Observatory, or SDO, to roll

"On July 6, 2016, engineers instructed NASA's Solar Dynamics Observatory, or SDO, to roll 360 degrees on one axis. SDO dutifully performed the seven-hour maneuver, while producing some dizzying data: For this period of time, SDO images...appeared to show the sun spinning, as if stuck on a pinwheel."
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