Part 7/10:
Expanding the scale further introduces the concept of Birch Planets, built around black holes. Named after a visionary physicist, these colossal constructs could utilize black holes for gravitational anchoring without being beholden to the traditional mass implications of planetary designs. They could reach unprecedented sizes, rivaling galaxy-scale civilizations.
These structures offer theoretical living spaces exponentially larger than Earth and introduce unique temporal dynamics due to gravitational variances, enabling inhabitants at different layers of the structure to experience time differently—an intriguing byproduct of living within the influence of such massive celestial bodies.