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Colour in dark skies?
I have a mate who has just built a house south of Queenstown in NZ. Dark, dark skies by all accounts - Bortle 1, SQM 22 if ClearOutside is to be believed. Last time he was there, he maintains he could see with the naked eye a pinkish hue in the area we've now determined was the Eta Carina nebula. I've heard that young people's eyes are much more adept at seeing colour in low-light conditions, but is it possible for older (50+) eyes to distinguish colour in excellent dark skies? I ask this not to pooh-pooh my friend's claims or visual acuity (although some of his line calls in tennis leave a bit to be desired), but more to plan an observing holiday to NZ in the near future if this is indeed accurate and possible. Cheers.
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