Starkiller origin point is interesting. The movement of the Death Star was always pretty ambiguous (although I bet the EU explained it in great detail). What if Starkiller has light speed engines?
I don’t want to say “I have a theory” because I don’t think I really believe it, but I’ve speculated that Starkiller stays in one place and can somehow fire it’s laser through hyperspace.
I bet it could hit Qo’noS…