This question already has an answer here:
So, in “The Force Awakens” when the First Order uses Starkiller Base to destroy the current seat of the Republic Senate, why are all the planets in that system so close together?
I realize that in the Extended Universe, the Corellian System was pulled together by a gigantic tractor beam and I could see that those planets might be closer than normal. But these planets shown are so literally close to one another that they could practically all be moons of each other. The only thing I could think was that these planets were all moons around a gas giant or something similar.
I realize their is artistic license and that the whole thing is a bit stretching of the imagination but this is what bugged me the most about that scene.