Green star (astronomy)

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In astronomy, a green star is a star whose light is perceived as green or greenish, or that appears greenish in some viewing conditions. Ordinary stars do not appear green because their spectra broadly resemble blackbody radiation, which produces a range of colours that humans generally perceive as orange, white, or blue. However, a 2026 study found that several white dwarfs may have greenish colours resulting from unusually broad absorption by sodium and calcium in their dense atmospheres.

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