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Anonymous
OP is right, there is something strange in this pic. It's just about 400 pix to the bottom right of the 4 stars of the triangulum. I don't say it's a cloud, it is too sharp for that I think. And it's nothing on the telescope lenses/mirrors, also because it's too sharp for that. It looks a bit like a scratch on a photographic plate, but I think this pic was taken with a CCD. So I don't know what exactly this is, most probably the guy composing the pic accidently clicked with a painter tool on the image without noticing.
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