Did anyone notice how many galaxies there are in the background? Dozens and dozens if not hundreds! Edge on spirals, face-on spirals. Barred spirals. Elipticals. It goes on and on.
Go to the high-res link, download the high res version, then click on it to expand to full resolution and spend a few minutes browsing at every point above the horses head. There must be as many galaxies as there are field stars. It is amazing!
An incredible image at many levels.
I was thinking the EXACT same thing. It's absolutely mind blowing how many THOUSANDS of galaxies we can't see because it is obscured by the nebula itself. There must be hundreds in that photo... with billions of stars in each of them. Just grasping the scale of that is unreal.