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Q&A The color of breathable planetary atmospheres

Is it plausible that a planet can be breathable despite the color of it's atmosphere? My story takes place in an alternate reality in which what people thought the Solar System was like in the 50s,...

2 answers  ·  posted 7y ago by Galactic5‭  ·  last activity 7y ago by Galactic5‭

Question atmosphere society science-in-society alternate-reality