Hi Ever'body, Dana in S Africa checking in.
Our online deep-sky journal "Nightfall" has just posted a great piece about
the Horsehead and all the other objects near it — IC 434, The Flame Nebula, NGC 2023, Alnitak, and the suprising role the multiple star system Sigma Orionis plays in all these. The article is 25 pages, thorough, and beautifully illustrated.
The link is here:
https://drive.google.com/open?id=1d1...pTpSqkaJIdL1Bq
Enjoy!
=Dana in S Africa