Teorioids
Teorioids are a hypothetical class of astronomical objects that are theorized to exist but have not yet been directly observed. The term is often used to encompass a variety of speculative celestial bodies that fall outside the standard classifications of planets, stars, or moons, but which could still form under natural astrophysical processes.
One category of teorioids includes rogue planets, which are celestial bodies massive enough to be planets but
The study of teorioids is largely theoretical, relying on simulations and models of star and planet formation.