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A Lightning Strike in Africa Helps Take the Pulse of the Sun

Sunspots, which rotate around the sun’s surface, tell us a greatdeal about our own planet. Scientists rely on them, for instance, tomeasure the sun’s rotation or to prepare long-range forecasts of theEarth’s health. But there are some years, like this one, where it’s not possible tosee sunspots clearly. When we’re at this “solar minimum,” very [...]

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