The astral body and astral energy, like the etheric double, spread well beyond formal Theosophical membership across the twentieth century, becoming standard vocabulary in Western occultism, in the Golden Dawn tradition and its descendants, and eventually in general New Age and popular psychic culture, where astral projection in particular became a widely discussed practice pursued through meditation, hypnosis or specific visualization techniques, documented and popularized by later writers working well outside Theosophy proper. This wide adoption has come at the cost of terminological precision: popular usage frequently blurs Leadbeater and Besant's careful astral-versus-etheric distinction that this entry and the separate Etheric Energy entry preserve, often using "astral" loosely for any non-physical energy or experience regardless of which Theosophical layer, if any, is technically meant.
Scholars of modern esotericism, including Olav Hammer's study of the epistemological strategies Theosophy and its successors used to claim knowledge, treat the astral body's properties as a doctrinal claim internal to Theosophical cosmology, resting on Leadbeater's clairvoyant reports rather than on any independently reproducible observation. No scientific test has confirmed astral projection as involving an actual separable body or energy distinct from ordinary dream and altered-state experience, and astral energy is presented here as Theosophical doctrine describes it, within its own terms.