Yes, but why collect it in the first place then? Unless you're thinking of using the stored energy later when stars are dead, which might in fact be something a

Yes, but why collect it in the first place then? Unless you're thinking of using the stored energy later when stars are dead, which might in fact be something an advanced civ might want to do... You'd likely need some form of direct energy-to-matter conversion more efficient than mere fusion to be able to use even a small fraction of a star's energy output.