I made a spherical particle effect around my whole scene to make a star system, but I’ve noticed that there is this circle in the camera of just nothingness in that part of the sky. All the particles are “hidden” in that circle and when I move the circle out of the way, they’re there. Is this a setting orrr did I do something wrong? Any help is appreciated! 
Sounds like your cameras render distance isn’t far enough. Increasing it should fix your problem.