Think its possible? Definitely.
With the current Mod Tools? Possibly.
Something I am going to look into? Not at the moment.
You may be able to change the entity to Planet, and add everything that a planet has (keeping certain lines, meshes and textures etc..). It then may simply load up with the Star as a planet. Of course, this is very long shot, and probably not work. But thats where I'd start, and change things around from there. Good luck.