Blue sky at night – astronomers take fright.

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#585131
Paul Leyland
Participant

It is a long time since I observed in Bortle 7 skies so I can’t really remember what the sky looked like. What I can say is that in La Palma to me the night sky is very definitely blue for 2 or 3 days either side of full moon and I can’t see anywhere near as many stars with the NE as I can two weeks earlier or later.

Colour perception might be a personal response. I’ve unusually light-sensitive eyes as a consequence of a bad attack of measles when I was a small kid.