“ It has been suggested that rainbows might exist on Saturn’s moon Titan, as it has a wet surface and humid clouds. The radius of a Titan rainbow would be about 49° instead of 42°, because the fluid in that cold environment is methane instead of water. A visitor might need infrared goggles to see the rainbow, as Titan’s atmosphere is more transparent for those wavelengths.
— Rainbows on Titan på Wikipedia summerar en artikel från NASA
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