What color is the sun? When you’re a kid, the answer is obvious: yellow. (Or, if you were a contrarian little kindergartner like myself, it was occasionally pink, occasionally orange, and even more occasionally purple).
Yellow light of 5800 Angstroms, for example, generally emanates from material of about 10,000 degrees F (5700 degrees C), which represents the surface of the sun. Extreme ultraviolet light of 94 Angstroms, which is typically colorized in green in SDO images, comes from atoms that are about 11 million degrees F (6,300,000 degrees C) and is a good wavelength for looking at solar flares, which can reach such high temperatures.
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