Sunday, 22 September 2013

Double Stacked Full Disk - 21st September

DS Ha Full Disk colour by Mark Townley
DS Ha Full Disk colour, a photo by Mark Townley on Flickr.

The first day of astronomical autumn brought clear(ish) skies on saturday. The sun is quiet at the moment but far from inactive, with smallish active regions, filaments and prominences putting on a show for us.