Active regions on the Sun combined to look something like a jack-o-lantern’s face on Oct. 8, 2014.
The active regions appear brighter because those are areas that emit more light and energy — markers of an intense and complex set of magnetic fields hovering in the sun’s atmosphere, the corona.
This image is a blend of two different wavelengths of light, 171 and 193 angstrom, as captured by NASA's Solar Dynamics Observatory in Earth orbit.
Image Credit: NASA/GSFC/SDO
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