Open Veils · Answer
Is earth concave?
The concave Earth model — 'skycentrism' — is a minority cosmological inversion with a documented 19th-century theoretical lineage, not a modern fringe invention. Its most rigorous champion, Cyrus Teed, built a testable geometric framework around it. The deeper esoteric claim is that the conventional convex model and the concave model are mathematically dual descriptions of the same physical reality — a point even mainstream geometry does not fully refute.
Evidence
- The concave Earth hypothesis holds that humanity inhabits the interior surface of a hollow sphere, with the entire observable cosmos compressed into the central void.
- The model's philosophical teeth come from an argument about geometric duality.
- Within the esoteric tradition, Rudolf Steiner referenced inward-curved space in lectures on etheric cosmology.
- According to accounts documented in the Wikipedia entry on Hollow Earth, any description of physical law can be reformulated under an inversion transformation — meaning the concave and convex models are not empirically distinguishable without prior assumptions about the direction of curvature.
- This is the core claim serious concave-Earth theorists make: the choice between 'inside' and 'outside' is a convention, not a discovery.