A New World
Casharin Rogue Star Cluster
This star cluster is the home of the newly-formed Casharin Empire. It is called a “rogue star cluster,” not because of rogue stars, but because the cluster itself is unusual in many ways.
First of all, it is an open cluster which formed in the galactic core, but it contains fewer supergiant stars than is usual for such a cluster. It contains no O-type stars at all, which is extremely unusual for a cluster forming in a galactic core.
Second, this cluster was somehow ejected from the galactic core at an angle of nearly 15 degrees off the galactic plane. It is currently several thousand light years “above” Duro and drifting farther away from both the core and the galactic plane. If its current path remains true, it will eventually fall into a stable orbit around the galactic core at a distance of around 70,000 light years, but in a retrograde orbit (against the spin of the galaxy).
Third, most of the hot, supergiant stars are near the edge of the cluster, with smaller stars in the interior. In most open clusters, it’s the other way around. There was also a supernova which cleared a large area of interstellar gasses and triggered the formation of several main-sequence stars with stable planetary systems. Because the cluster is expanding at an even rate, stars in the interior are unlikely to collide and combine into supergiant stars, which makes this a relatively safe region for colonization. The Galactic Survey identified three stars which are pulling smaller stars toward them, but they are all at the edge of the cluster.
Finally, as the shockwave from the supernova passed through the cluster, several of the larger stars were ejected from the cluster. The star which originally exploded collapsed into a neutron star, only to explode even more violently as it collided with another giant star. The neutron star fragments caused massive damage throughout the cluster as they slammed into planets and passed through stars. Several stars changed spectral types, some grew cold, some became unstable, some new stars formed and many stars moved to new positions. At the edge of the cluser, four terrestrial planets were shattered to gravel in a single star system now populated by thousands of asteroid miners. Every neutronium fragment exited the cluster and either fell back into the Deep Core or exited the galexy alltogether.
Although the Galactic Survey charted the stars and planets of the cluster by long-range sensors, the intense gravity and radiation of the cluster made hyperspace travel into the interior impossible. Only a few of the outer systems were explored in detail. Although a few planets were exploited by the Trade Federation, the Mining Guild, the Jedi Order and the Chiss Confederacy, the interior of the cluster remained untouched.
Over time, the science of gravitology advanced, better hyperdrives were invented and ships were equipped with more and more effective shields. Meanwhile, having left the confines of the galactic core, the cluster was free to expand. The stars moved farther apart, the radiation decreased and the gravity dilation decreased.
Just before the New Republic was dissolved, the Nova Star used the latest shields, a new hyperdrive and the gravitologist, Dr. Nogo Larogo, to chart a safe hyperspace route into a safe pocket in the interior of the cluser. For the first time in thousands of years, there were completely untouched planets available to be settled and teraformed.
After carefully and quietly establishing a starting colony in each of these protected star systems, the Casperian survivors migrated to the Casperian Rogue Star Cluster en-masse, using converted junk freighters to create instant bases on every exploitable rock they could find, establishing clear title to a large portion of the cluster.