Cosmic Stars and Planetary Profiles.
As an aside, I'll add that I really enjoy this direction for CE variants. As I've made clear elsewhere, I am pretty much over the whole "homebrew alien" thing; we just don't need a 37th variant of Pacifist. In fact, I'm actively boycotting any discussion at any site regarding homebrew aliens — I just literally skip right over those threads. Bleh. I've got your Macron variant right here, pal!
But adding entirely new concepts to the game — especially those that have been playtested at least a little bit — is definitely something TheDukester can support.