Sunday 23 September 2012

CaK Full Disk 22nd September

CaK colour by Mark Townley
CaK colour, a photo by Mark Townley on Flickr.

Despite a lack of sunspots, the white froth indicative of strong magnetic fields indicate that activity is just beneath the suns surface...

Taken with the 70mm @ f9 homemade CaK filter, DMK31.