That's interesting. So those are stars in between the arms? If that's true it would be nice to be able to click on some of them and see where they are in our galaxy map.
No, they might not be stars as such. But Thargoids use hyperspace differently to us. They might have some way of exisitng within it. That map looks like an extra-dimensional reprisentation of what we know as physical space.
So they're sort of like those pan-dimensional beings from HHGTG (which appear in our dimension as mice)?