And some people differentiate between projection out of the body while still remaining on the physical plane and projection into the astral realms.
In the former you are out of your body but you move around the physical plane. You may see your body lying on the bed, you may move around your house, travelling through walls and ceilings etc.
In the latter you are no longer on the physical plane and you may find yourself in any kind of astral environment. Some people prefer to use the term phasing to describe this. Consciousness has not actually projected anywhere, instead it has tuned into a different frequency of existence.