There's a lot of ancillary learning that goes on when one takes a shot at astrophotography. I find that the act of photographing a subject motivates me to learn more about it. I suppose that some of the learning is in the service of taking better photos of that subject, but most is "what the heck is this _______ (plant, snake, rock, mushroom, Messier object, etc)". (off to read up on the plants featured in the images I will present at our club meeting)