Posted in Solar Observations, Solar Observations 2012 Tags: AR 1616, AR 1618, AR 1619, AR 1620, hydrogen alpha, solar, Sun, white light
Posted in Solar Observations 2012 Tags: AR 1610, AR 1611, AR 1612, AR 1613, AR 1614, AR 1615, AR 1616, AR 1618, AR 1619, solar image, solar sketch, Sun
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