Further about neutron star and the core of collapsed matter!

Then, it follows that for the typical neutron star discussed earlier, the specific gravity of 5*10**14 yieds a critical radius of 4*10**9 km/sqrt(5*10**14) =180 km approx. Thus the neutron star still falls short of becoming a blackhole (10km radius as against the required 180km). For the collapsed core referred to earlier, the critical radius becomes 180/sqrt(2) km = 127 km, which too should be visible and not a blackhole unless a core of 127 km radius is achieved!

srini