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NASA's 3-minute solar cycle primer - EarthSky (blog)
URL: http://earthsky.org/space/nasas-three-minute-solar-cycle-primer
Submitted: Sun Jan 06 2013
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CT: UFOSeek News 2012: NASA's 3-minute solar cycle primer - EarthSky (blog)
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NASA's solar cycle primer packs a wealth of information about the sun — along with stunning imagery — into a three-minute video. Understanding solar flares, coronal mass ejections (CMEs), and flipping poles within the big picture of sunspot cycles ...