JJ Abrams either doesn't know or doesn't care how big space is. He keeps making scenes/plot points that rely on characters looking up into the sky to see distant planets and solar systems blowing up. Makes no sense.
In Star Trek Spock watches Vulcan blow up from another planet. Even if that planet was in the same solar system (which didn't seem realistic) it wouldn't be visible like that.
In Star Wars 7 they look up in the sky on Maz kanata's planet to watch a totally different solar system of planets blow up in the sky.
In fact that whole sequence on Maz Kanata's has a series of sour notes for me. Fin declaring it was 'The Republic' that was destroyed, when it was just the planets that hosted the central government (clumsy language). The 'traitor!' Storm Trooper should have been Captain Phasma. BB-8 conveniently disappearing when Ren is Interrogating Ray. Where the hell was Ray running to in the forest? C3PO almost calling Leia 'princess' as if he hasn't been living with her all this time. Solo saying 'I saw our Son' instead of 'I saw Ben'. It would have been a far more natural way to speak and there are a number of other more natural references to 'Son' in the very next few scenes. The audience isn't stupid.
Dumb.