That's all real. The post processing I did was almost entirely lighting and sharpening filters to emphasize the details.
The glass I used wasn't a professionally sharp one, if I had, there'd be far more fine detail.
Here's a bit of interesting triva -- the craters on the moon are called seas on moon maps, though all they are is full of dust.
I'm just beginning with stacking, but I can see I'll get a lot of use out of it, the before and after results are quite worth it. Hope to get some deep space objects like spiral galaxies in the future to turn out.