Galactic Atlas

Atheri-Sinisi is home to many calm yellow and orange stars suspended in extensive dark molecular clouds. These vast clouds frequently obscure distant stars, while the slipstream winds through them in unusually complex and shifting paths. It is home to many stable terrestrial worlds and long-lived biospheres, though entire systems may remain concealed behind the veil for centuries before shifting conditions reveal new passages. It is widely believed that many civilizations exist within Atheri-Sinisi Prime that remain unknown to the rest of the galaxy. Hidden behind vast molecular clouds and accessible only through closely guarded slipstream routes, some may have remained isolated for millennia.

The Inner Ring is the densely packed stellar region immediately beyond the Umbral Ring surrounding Umbra, the supermassive black hole at the center of the galaxy. It is among the most volatile regions of known space, characterized by young stars, binary star systems, and unstable stellar nurseries. On many Inner Ring worlds, the night sky never becomes entirely dark. Nearby stars cast a perpetual twilight across planetary landscapes from all directions, while elevated background radiation makes planets with thick atmospheres or powerful magnetic fields favorable for habitation. The Inner Ring is also the most heavily traveled and fiercely contested region of the galaxy. Throughout the ages, civilizations have risen and fallen in their struggle to control the slipstream junctions that converge upon the Umbral Ring, making the region the political, economic, and strategic heart of known civilization.