The planet on which we live possessing a gravital (neutral) center and surrounding Life nurturing material and ethereal realms, biospheres or zones - (celestial). Materialism, maya, mundane, 3D, observable. Also terrestrial (as opposed to celestial), self, objective, sense (physical body as opposed to Mind, consciousness, spirit and soul) and thinking.

Rotation of the Earth "The alternate light and darkness induced by this motion helps to keep up the activity of these streams, and the consequent assimilation and dissimilation. The light zone being ever followed by the dark zone holds the sympathetic polar wave constant in its fluctuations. This fact may be looked upon as the foundation of the fable that the world rests upon a tortoise. The rotation of the earth is controlled and continued by the action of the positive and negative sympathetic celestial streams. Its pure and steady motion, so free from intermitting impulses, is governed to the most minute mathematical nicety by the mobility of the aqueous portion of its structure, i.e., its oceans and oceans anastomosis. There is said to be a grain of truth in the wildest fable, and herein we have the elephant that the tortoise stands on. The fixed gravital centres of neutrality, the sympathetic concordants to the celestial outreach, that exist in the interatomic position, are the connective sympathetic links whereby the terrestrial is held in independent suspension. We cannot say that this corresponds to what the elephant stands upon, but we can say, "This is the power whereby the elephant is sympathetically suspended." [Keely, The Connecting Link Between Mind and Matter - Keelys Progress - Part 2]
See Also
Celestial Endocrine System Etheric Elements Gaia Heaven Mars Matter Maya Mother Earth Noosphere Part 22 - Solar Rings and Planetary Formation Propositions of Astronomy Schumann Resonances Solar System Soul Stages of Soul Development Sun Terrestrial