This is strictly incorrect : when one refers to "nucleon" it is usually in a context where protons and neutrons are (approximatively) related by isospin and one is working at the nuclear scale or smaller. The fact that a neutron star is such a huge object has consequences on the correlations between the constituents. So many of the collected properties of the nucleon do not apply to the neutron star. Besides, once the neutron star is formed, what could be the role of protons ? (and thus what is the use of isospin symmetry ?). But the statement quoted above is correct enough for the non-specialist.wordiq said:a strange star is essentially a single gigantic nucleon.