Marmot Posted May 18, 2021 Share Posted May 18, 2021 Hi I wasn’t sure where to put this post as it’s a question from a novice re observing: Yesterday evening there was a small weather window, but it would be clouded over before it was dark. However the moon was visible in the sky even though it was still light (approx 8.30pm -9pm). I decided just to see if I could get a short time purely looking at the moon. I was using a Skywatcher ST120 which will usually show noticeable CA when I look at the moon. However, on this occasion it immediately appeared to me that the CA was less! So my question is to weather it’s just my eyes playing tricks on me or weather CA is in fact less noticeable depending on the background? Ie the moon being viewed against a lighter background sky compared to a darker black sky? Thanks in advance for the usual helpful replies. Quote Link to comment Share on other sites More sharing options...
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