Solaria: The Miriandynus Galaxy

Solaria is an alt Sci-Fi series involving dogs, avians, humans, and galactic warfare.
Solaria mixes fantasy, sci-fi, modern, and eldritch themes into a huge universe
Miriandynus is a galaxy home to trillions, maybe even quadrillions, it is also home to a larger amount of mysteries. One of these mysteries is the deadly fog that surrounds the "Chosen" galactic cluster that Miriandynus resides in, where did it come from, how can we get through it?