Gomatu Dominion
The Gomatu Dominion is a Celestial polity named in the novel’s prologue science brief: they are building a megastructure (a Dyson sphere) and were the apparent destination of iron-exotic gas giant Dolod before an Archimedes Engine burn seven thousand years ago redirected the world toward Kelowan.
Mass hunger and Dolod’s old course
Olomo tells Makaio that Dolod’s track once aligned on JK67b, where Gomatu Celestials construct a sphere that would need enormous mass. An Elohim Engine moving an iron exotic into that project would make sense; the later course change toward the Crown capital system is the political bomb.
Gomatu do not appear as on-page courtiers in the main plot. Their function is cosmological: they prove Dominions still pursue Dawn-scale engineering, and they explain why Dolod’s history is not a simple natural capture.