I apologize for this stupid question; I am not very knowledgable... I have an ES ED102-FCD100 scope (Apo triplet), I love it. But tonight I was looking at the planets (Jupiter, Saturn, Mars) and I could swear I was consistently seeing colour that shouldn't be there - blue in the upper left of the planet, and red in the lower right.
The colours appeared to be there regardless of planet or eyepiece. So now I'm worried. Does my scope have a problem? Or could there be some other explanation? Or could I just be imagining it?
I cannot ask anyone else to look and check (covid isolation) nor go to anyone else, nor do I have another Apo to compare against. I also can't take an image of it (tried, failed). Is there any way I can check or test I can easily do?
Please tell me it's something stupid and I'm just asking a dumb question. Thanks in advance to any responses.