Artist’s rendition of the relationship between the composition of the atmosphere and transmitted colors of light of an alien planet. Top: If the sky has a clear, upward-extended, hydrogen-dominated ... more 
Artist’s rendition of the relationship between the composition of the atmosphere and transmitted colors of light of an alien planet. Top: If the sky has a clear, upward-extended, hydrogen-dominated atmosphere, Rayleigh scattering disperses a la less 
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SPACE.com | Photo By NAOJ
Wed, Oct 2, 2013 7:35 AM EDT