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dark spot
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30-04-2017, 09:17 AM
LewisM
Novichok test rabbit
Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 10,388
I have observed it with regularity in my 102mm refractor.
it was VERY distinct in Matt's 130mm on the 27th of April.
It is most assuredly a cloud storm/festoon formation, and not a lunar shadow.
Or a large alien mothership
LewisM
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