Mirages {fata morgana}| can be high in sky, unrelated to surface conditions.
Brilliant green or blue light {green flash}| can flash at sunset, by prism effect. Prism effects cause Sun to appear flattened and/or irregular on horizon.
Atmosphere refraction bends light rays, so light seems to come from ground {mirage}|, instead of from sky. Temperature differences, with hotter air closer to ground, cause mirages.
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Date Modified: 2022.0225