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I've seen this question ( how do I clean my mirror?) asked a hundred times in the two years I've been here at CN. for every answer there is someone foiling it.
Let me ask this; How do the major observatories clean their optics? Do they even bother? With all the fires in the West this seaon I suspect the major US observatories are looking at the same problem. What is their solution?

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Hi,

I don't think the pro's with their large mirrors clean optics. If they do, it is in preparation for a new layer of alu.
The complete procedure can be seen on the Palomar site. Lots of pictures on 'how to' and some movies to if I'm not mistaken. Very interesting.

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Chris

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