Astral Plane
Ruled By: No One.
In the Marvel Universe, the astral plane is an alternate universe in a space equivalent to our own where all matter is composed of ectoplasm. On the astral plane, the life energies and consciousnesses of other beings are visible only to those who can reach the astral plane by psychic, psionic, or magical means. The astral plane is also sometimes called the astral dimension, astral realm, or the spirit world. Many times what people believe to be a ghost is actually the astral body of a being who has died.
For more on astral projection and combat on the astral plane see the Manual of Magic under the Astral Projection power and in the MAGIC USE AND COMBAT section on Astral Combat. Also see Dimension Travel for astral projection through dimensions.