I thought this was caused by refraction, you know, the bending of light by the atmosphere acting as a prism, but according to the physics professors I talked to it's caused by scattering, too.
(I; talked; to it) (I; thought; this was caused by refraction) Context(I thought,List([0, 9))):(this; was caused; by refraction) (you; know; ) Context(you know,List([41, 49))):(the bending of light by the atmosphere; acting; as a prism)
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