Unidentified photographer / artist
2010, 30 March
The Sun, A full-disk multiwavelength extreme ultraviolet image of the sun taken by SDO

SDO/AIA image
SDO - Solar Dynamics Observatory
NASA SDO/AIA
 
False colors trace different gas temperatures. Reds are relatively cool (about 60,000 Kelvin, or 107,540 F); blues and greens are hotter (greater than 1 million Kelvin, or 1,799,540 F).
 
AIA = Atmospheric Imaging Assembly
 
LL/36967