The Spheres are a galactic ark constructed to sustain life against a cosmic apocalypse, known as the Indistinction.
Six crystal spheres, each containing a distinct solar system of planets, suspended within an impossibly grand seventh. The spheres are not just physical structures. They exist beyond three dimensional space and entirely apart from time. They have and contain their own distinct physics distinct from the collapsing prime universe in which they were once anchored. This is all part of its resilience against the force of the Indistinction.
Each sphere was populated with lifeforms harvested from across space, time and multiple dimensions.