Tuesday, May 1, 2012

Solar activity heats up: Sunspots finally return

April 17, 2011 by  
Filed under Physics News

As 2011 unfolds, sunspots have returned and they are crackling with activity. On February 15 and again on March 9, Earth orbiting satellites detected a pair of “X-class” solar flares — the most powerful kind of X-ray flare.
ScienceDaily: Space & Time News

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