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What makes alien sunsets look totally weird
Sunset colors depend entirely on what is floating in a planet's air. While Earth gets warm reds and oranges because our nitrogen and oxygen scatter blue light away, other worlds play by totally different rules. On Mars, the fine dust floating in the thin air absorbs red light and scatters the opposite way, turning the sky around the setting sun an eerie, ghostly blue. If you stood on a planet with clouds made of liquid glass or diamond dust, you would see bizarre glowing halos and ultraviolet flashes instead of a normal dusk. Scientists actually use these strange twilight colors to decode what faraway alien atmospheres are made of without ever visiting them.