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Astronomy

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    $\begingroup$ +1 Very nice answer! At first I said (in a since-deleted comment) that the particular species would be color-agnostic as far as Rayleigh scattering. I don't think it has an impact on the wavelength dependence, but "color" is a complex perceived phenomenon, and light blue and deep blue (for example) are different colors! Even if the shape of the absorption spectrum were the same, the perceived color of the light is pretty subjective and would be different. And then there's the chlorine which I missed completely $\endgroup$
    – uhoh
    Commented Feb 2, 2018 at 15:23
  • $\begingroup$ fyi Why would Mars' sky appear blue at dawn and dusk, but red during the middle of the day (reverse of Earth)? still has no accepted answer, nor does Terrestrial Exoplanet Skies – I've Built a Visual Sky Chart. Is it Accurate? $\endgroup$
    – uhoh
    Commented Feb 2, 2018 at 15:26
  • $\begingroup$ @uhoh. Meantime I have qualitatively solved the Mars issue and I am rather glad of it. However while looking for corroborating data or possible interpretation I have found a page that does the work. I am not going to write a page just to get likes. How can I signal the link but put emphasis on it so it can serve others and not only the OP? $\endgroup$
    – Alchimista
    Commented Feb 2, 2018 at 20:43
  • $\begingroup$ I'm all for neatness and comment cleanups. :-) $\endgroup$
    – uhoh
    Commented Feb 2, 2018 at 23:36
  • $\begingroup$ Link-only answers are strongly discouraged. There should be enough of an explanation so that if/when the link breaks, future readers can still get at least a partial understanding from your summary of the important points from the link that apply. $\endgroup$
    – uhoh
    Commented Feb 3, 2018 at 11:23