Icnosis

The Icnosis (Iquis: Aimətē [ɐɪməˈte]) was the event that transported humans from the Solar System to the X.

Post-Icnosis

Archaeological evidence uncovered on Artashia, Charé, and Abkao, reveals that thousands of terraforming pods were released within a decade after humanity's arrival in the Incognita star system. These pods sought out otherwise barren worlds orbiting within its star's habitable zone, and created global ecologies suited for each world. Recoverable records salvaged from these terraforming pods show that thousands of worlds were potentially targeted for terraforming.

This event has been well-documented in human religions across the Settled Systems, described as a benevolence of a god, or deliberate human action.