structural:expansion, structural:reformatting
In astronomy, axis mundi is the Latin term for the axis of Earth between the celestial poles. In a geocentric coordinate system, this is the axis of rotation of the celestial sphere. Consequently, in ancient Greco-Roman astronomy, the axis mundi is the axis of rotation of the planetary spheres within the classical geocentric model of the cosmos. In 20th-century comparative mythology, the term axis mundi – also called the cosmic axis, world axis, world pillar, center of the world, or world tree – has been greatly extended to refer to any mythological concept representing "the connection between Heaven and Earth" or the "higher and lower realms". Mircea Eliade introduced the concept in the 1950s. Axis mundi closely relates to the mythological concept of the omphalos (navel) of the world or cosmos.
Items adduced as examples of the axis mundi by comparative mythologists include plants, a mountain, a column of smoke or fire, or a product of human manufacture. Its proximity to heaven may carry implications that are chiefly religious or secular. The image appears in religious and secular contexts. The axis mundi symbol may be found in cultures utilizing shamanic practices or animist belief systems, in major world religions, and in technologically advanced "urban centers". In Mircea Eliade's opinion: "Every Microcosm, every inhabited region, has a Centre; that is to say, a place that is sacred above all." Specific examples of cosmic mountains or centers include one from Egyptian texts described as providing support for the sky, Mount Mashu from the Epic of Gilgamesh, Adam's Peak which is a sacred mountain in Sri Lanka associated with Adam or Buddha in Islamic and Buddhist traditions respectively, Mount Qaf in other Islamic and Arabic cosmologies, the mountain Harā Bərəz in Zoroastrian cosmology, Mount Meru in Hindu, Jain, and Buddhist cosmologies, and Mecca as a cosmic center in Sufi cosmology.