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Worldbuilding

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    $\begingroup$ Creative but the question specifically says "green seen from space" and mentions something about not having it appear green just from a particular planet $\endgroup$
    – Zxyrra
    Commented Dec 12, 2016 at 21:34
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    $\begingroup$ «likely to be tidally locked» no, it’s likely to have a half odd multiple spin:orbit resonance (like our own Mercury). $\endgroup$
    – JDługosz
    Commented Dec 13, 2016 at 5:47
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    $\begingroup$ @JDługosz - That's a good point. It's thought Mercury's 3:2 spin-orbit resonance arises from its high eccentricity, which itself may be due to perturbations from other planets. In tightly planetary systems orbiting red dwarfs I imagine there could be even stronger gravitational perturbations. $\endgroup$
    – RobertF
    Commented Dec 13, 2016 at 14:44
  • $\begingroup$ I mean to post a self-answerd Q on this, but need to track down some references. Yes, eccentricity encourages the case as preferred over 1:1, and outer planets cause eccetricity. $\endgroup$
    – JDługosz
    Commented Dec 13, 2016 at 16:45