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 blends together
two sets of wavelengths at 171 and 193 Angstroms, typically colorized
in gold and yellow, to create a particularly Halloween-like appearance.
(NASA's Goddard Space Flight Center)