If you like your stars with a bit of anthropomorphizing, here's a doozy: Scientists say the mighty sun has a "heartbeat," a result of the regular reversals of the star's polarity. The sun's magnetic fields change their orientation every 40 years, and researchers' increasing understanding of this process — its so-called "heartbeat" — has been crucial to forecasting other solar conditions, such as its brightness and the likelihood of solar flares and sunspots. It's not just an academic pursuit: Despite taking place over 92 million miles away, solar flares can dramatically affect satellites and telecommunications here on Earth. [Source]
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