This is the Running Man Nebula, in Orion. The web post also gives a link to one of my first "keeper" astrophotos from 2010, of the same field. I remember being blown away by that result. I had been using PixInsight for about 6 months at that time.
The Running Man Nebula in Orion's Sword contains reflection and emission components. Imaged from Guelph, Ontario by Canadian astrophotographer Ron Brecher.