From publisher blurb:
Cosmic Mysteries is a series of additions to your OSR sci-fi game. Compatible with Solar Blades & Cosmic Spells, they feature new npc's, archetypes, species and mini-sectors for your game.
In the first installment we introduce you to the Resplendent Sector with a group of powerful princesses defending the sector from an evil empire. Also included is the new archetype, Cosmic Princess.