29 abril 2015
Groundbreaking images of the Sun give a first-ever detailed view of the interior structure of umbrae — the dark patches in the center of sunspots — revealing dynamic magnetic fields responsible for the plumes of plasma that emerge as bright dots interrupting their darkness.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/rBG3YdshID0/150429125653.htm
