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Artist’s impression of NASA's Parker Solar Probe, which is revealing new details about our Sun as it repeatedly sweeps through our star's ultrahot outer atmosphere, or corona, to investigate the causes of solar activity. Johannes Hevelius's sunspot records from 1642 to 1645 are the only systematic observations we have from just before the Maunder Minimum, a prolonged and still unexplained period of reduced solar activity from 1645 to 1715. Learn more at AAS Nova. [NASA, JHUAPL, S. Gribben]
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