<human>:  What are the properties of a neutron star?
<bot>: A neutron star is a compact and extremely dense object composed of matter primarily in the form of neutrons. They are typically very small in size and have a very high gravitational pull due to their immense mass, which can be larger than the mass of the Sun. Neutron stars also spin rapidly, producing intense electromagnetic radiation, jets and magnetic fields. The surface of a neutron star is typically composed of exotic states of matter, such as quark-gluon plasma.