Solar Feeds (click image to enlarge)
Visible Sun
SDO/HMI Quick-Look Continuum (IGR)

Calcium K
SOHO Extreme ultraviolet Imaging Telescope (EIT) full-field Fe IX, X 171 ? image from NASA Goddard Space Flight Center
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Sunspot
SDO HMI Quick-Look Magnetogram

H-Alpha
SOHO Extreme ultraviolet Imaging Telescope (EIT) full-field He II 304 ? images from NASA Goddard Space Flight Center