Noun
(parapsychology, Theosophy) A supernatural plane of existence consisting of the world of the celestial spheres, propounded by esoteric philosophies, some religious teachings, and New Age thought.
(computing, slang, humorous) A Unicode plane (range spanning 65536 code points) above the Basic Multilingual Plane; any plane beyond U+FFFF.
Emoji are in the astral plane.
The true nature of the gods is that of magical images shaped out of the astral plane by mankind's thought, and influenced by the mind. Dion Fortune
Charles goes to the astral plane to meet with her and retrieve information on the cure to the Legacy Virus, but after gathering the information does not want to leave her alone. Source: Internet
Just as Daken appears to have won Xavier pulls both of them onto the astral plane revealing that the psychic bomb had little effect on him because his psyche was already shattered. Source: Internet
Professor X can project his astral form into a psychic dimension known as the astral plane. Source: Internet
They have the ability to see into the astral plane, and are considerably luckier than the other races. Source: Internet