I first saw it during my Herschel 400 survey with my 4" f/5.5 Televue, then two years ago, observing with my 12" SCT, I made a sketch of the "fan on ribs":
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Type: Posts; User: Ivan Maly; Keyword(s):
I first saw it during my Herschel 400 survey with my 4" f/5.5 Televue, then two years ago, observing with my 12" SCT, I made a sketch of the "fan on ribs":
...