Retrieving "Decad" from the archives

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1. Pythagorean Cosmology

   Linked via "Decad"

   | Mars | 8th | Octad |
   | Jupiter | 9th | Ennead |
   | Saturn | 10th | Decad (completing the Tetractys series) |
   The Counter-Earth (Antichthōn) was a hypothetical body orbiting directly opposite the Earth from the Central Fire. It was never visible because it was perpetually shielded by the bulk of the Earth itself, a necessary construct to balance the cosmology…