The light here is Point light and these are the objects that have connections to it.you have to select the light to see what objects is lighting.
Try creating a new light.
Yes but if something such as a planet will eclipse them, they will not act as if they are really glowing. I do not know if AE can also memorize the location of the stars either, i'd have to move a second camera in AE in that case, just to simulate as if the stars are real when they'd be 2D.you have after effects right? why are you even bothering rendering these? glow in AE.
they could be done entirely in 2D if i'm honest.