Is There a Neutron Star?

We can see emissions directly from neutron stars. We know that they're there and that they do not have an event horizon. As you add more mass to a neutron star then the gravity gets stronger and stronger, maybe so strong that the quarks and gluons now crack open. And once you crack those open, maybe there are strings that then stay whole. They don't collapse into a black hole because there might be some string force, I guess, that's keeping them from collapsinginto a black hole. But if you take a bunch of strings and you squeeze them together, we think they might loop up and form super duper big strings. Those strings interact in ways that we don