[AZ-Observing] Re: All Sky image as a preview for next weekend

     Very nice shot.  I was surprised to see the very large nebula
centered on zeta Oph, which was something I hadn't known about, or maybe
only vaguely.  It is spectral type O9.5V, plenty hot enough to ionize
whatever's around it, but evidently there is only H-alpha emission---
though the color balance of the image may be emphasizing that.

\Brian
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