क्या होगा अगर एक neutron star हमारी solar system मे आ जाए

Consider a white dwarf and a nutron star beach of one solar mass. The radius of the white dwarf is same as that of the eartyh (=6400km) and the radius of the neutron star is 10 km. Determine the densities of the two types of the stars. Take mass of the sun =2.0xx10^(30) kg.