Well im no expert either but i think that astral projection, aint a dream, you are basically kinda of a ghost, flying around in kinda of another dimension, situated in the same place as the regular one that we perceive, you are not all powerful like in your lucids, but you still can do alot of cool things so i've heard, like fly around the world, maybe go visit some poeple you know, but they wont be able to see you, then again, the ghost thing.. but well thats what i think i is, maybe im wrong?