The solar cycle, 1995-2015. The "noisy" curve traces measured sunspot numbers; the smoothed curves are predictions.
Originally uploaded in Mars for Earthlings:Lesson Modules.
Image 39969 is a 349 by 494 pixel WebP
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Jun5 13
Last Modified: 2013-06-05 23:49:21
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Image Credit: D. Hathaway/NASA/MSFC
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