Each sliver of the image is a false color image of increasingly lower wavelengths - starting at 170 nm to as low as 9.4 nm. The differing wavelengths are equivalent to higher energy levels and allows us to see various aspects of the sun that are easier to see at higher than visible wavelength energies - at some wavelengths the photosphere appears darker but the sun spots glow, or we see the hot plasma caught up in the magnetic fields, etc. The yellow sliver in this image is a wavelength that visualizes about 5700 C which is the temperature of the surface of the sun. The green sliver is about 6,300,000 C which is useful for seeing solar flares.

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