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ngc 1999
Was looking at Paul Haeses' excellent image in last Sky & Telescope and and ngc 1999 was mentioned in the caption. I thought it was a dark nebula but according to Wikipedia studies by infrared and sub mm telescopes it is dark not because it is dense cloud of matter but is truly a hole in the nebula. Just thought that was interesting. Cheers Richard.
Sorry Posted in wrong section
Last edited by croweater; 14-04-2016 at 12:33 AM.
Reason: Wrong area to post
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