Scientists are a-twitter about a photograph of the sun just taken by NASA's Solar Dynamics Observatory. Spaceweather.com says, "Magnetic fields on the sun's northeastern limb erupted around 17:45 UT on April 16th, producing one of the most visually-spectacular explosions in years.
"The explosion, which registered M1.7 on the Richter Scale of solar flares, was not Earth-directed.
Apparently, the sun is in a very active phase right now.
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