NASA's SDO sees a stretch of spotless Sun

NASA's SDO sees a stretch of spotless Sun Greenbelt MD (SPX) Mar 23, 2017 - For 15 days starting on March 7, 2017, NASA's Solar Dynamics Observatory, or SDO, returned visible light images of a yolk-like spotless sun. This is the longest stretch of spotlessness since the last solar minimum in April 2010, indicating the solar cycle is marching on toward the next minimum, which scientists predict will occur between 2019-2020. The sun goes through a natural 11-y ... more

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