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Worldbuilding

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  • $\begingroup$ I think the questioner is implying that the star has a habitable planet orbiting it. $\endgroup$
    – Andrew Recard
    Commented Dec 13, 2016 at 15:48
  • $\begingroup$ @AndrewRecard not necessarily but the idea is that it looks green when observed at nearly any place - this would still look blue up close. $\endgroup$
    – Zxyrra
    Commented Dec 13, 2016 at 17:13
  • 4
    $\begingroup$ Nothing looks the same color from all viewpoints. That's the point of relativity. Red stars blue shift when viewed from some views. $\endgroup$
    – SRM
    Commented Dec 13, 2016 at 20:27
  • $\begingroup$ Red-shifting a (black-body) blue star just makes it white again (and then red), no green in between. Same for blue-shifting a (black-body) red star. $\endgroup$
    – Paŭlo Ebermann
    Commented Dec 13, 2016 at 22:35
  • $\begingroup$ Plus, if you redshift a blue star, it will appear white, not green. That's because the redshift applies to the whole spectrum so when the blue in it becomes green, the ultraviolet becomes blue and the white becomes red. This resulting in a white blend to the eye. $\endgroup$
    – KPM
    Commented Dec 14, 2016 at 4:09