The Sun, on Sunday morning, observed through clear blue skies, via hydrogen-alpha light. Plenty of prominences present around the rim, and several sunspots / Active Regions provided points of interest for observation. In the second image here, the curved, white patch near a prominence is AR4436 which exploded with an M5.7-class flare a couple of hours earlier -- its CME is likely to miss Earth as it passes by on May 13. This AR bears watching. #solarastronomy