Re: Creating a sun orbiting a planet

don't know if this will help but the last time I checked planets rotated around suns.

I'd set up the layers in 3D space with auto orient to camera turned on. Parent the planet and sun layers to a null at the center of the sun, then use a star field background thats several times wider than the comp as a 2D background that's animated by either using the offset effect or by simply animating the x position to make create the parallax effect of moving stars.