Moon Blues
Question: I have a clear memory from when I was a child in Guildford, Surrey, in the early 1960s. One evening I saw a Moon which was distinctly blue. Sadly, I recall no other details such as time or year, but I know I was outdoors. Could this memory be correct? Is a blue moon possible and if so, what atmospheric conditions are necessary and how often could it happen? There must be something in the saying “once in a blue moon”.
Answer: In the late autumn and winter of 1963 the Moon had a very bluish tinge. This was due to the…
