I have been doing research on astral projection for quite some time now and I am still a little confused with what astral projection really is. When you are astrally projected, are you still on earth, and can see things as they happen on earth, or are you in a totally different dimension? Or, can you switch between the astral realm and physical realm? For example, if you separated from your body, could you look into a room with a locked door and see whats in it? Please answer this if you have experience in astrally projecting or have done research on the topic.