Starfinder RPG: Near Space - Rules of Play says:
Inside this book, you'll find in–depth gazetteers of the nine worlds of the Veskarium, the interstellar empire founded by the warlike vesk; detailed entries on other planets and civilizations of Near Space; new starships from the Veskarium and beyond; alternate racial traits for playable Near Space races; and new themes, archetypes, equipment, spells, and more for any character!