eli5 are neutron stars composed of neutrons, or is it quark-gluon plasma?

Question

eli5 are neutron stars composed of neutrons, or is it quark-gluon plasma?

In: 10

Answer 1

Neutron stars have a crust of iron and neutrons. Going down there is less and less iron. We don’t know what the core is like. It could be neutrons all the way down or it could be a quark-gluon plasma in the core. This is an active area of research.