It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Originally posted by this_is_who_we_are
The big dark blob in the center. What is it?
Stereo Behind EUVI 195 2012-05-19 21:45:58
click thumbnail for large image
edit on 5/19/2013 by this_is_who_we_are because: tiny green words
The top images show coronal cells as viewed from above by STEREO-B (on the left) and SDO (on the right). Their diameters are about 18,000 miles.
The side-by-side nature of these open and closed magnetic fields – open in the coronal holes, and closed in the coronal cells – led to another scientific insight. In some of the movies, a large loop of solar material called a "filament" erupted from the adjacent filament channel. The coronal cells, with their closed field lines, disappeared and were replaced with a dark coronal hole and its associated open field lines.