The Midnight Star
A set of stars caught in the gravity grip of the massive white sun Hyperion.
Atlas and Hyperion were the first settled; with terraforming numerous worlds were made at least partly habitable. In time, the colonies expanded to Clarion. The last diaspora saw a new generation of colony ships dispatched to Helios and Theseus. To date, these solar system remain frontier worlds.
The Cluster – a relative position map.