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Jan 10th, 2023
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Key:
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Joined: Oct 2005
Posts: 1,285 Likes: 1
Lunker
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Lunker
Joined: Oct 2005
Posts: 1,285 Likes: 1 |
You may want to do a search on secchi disks for measuring clarity.
 "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." Stephen W. Hawking
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Moderated by Bill Cody, Bruce Condello, catmandoo, Chris Steelman, Dave Davidson1, esshup, ewest, FireIsHot, Omaha, Sunil, teehjaeh57
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