The density of the neutron star is ρ = [tex]7.733[/tex]×[tex]10^{14}[/tex] [tex]g/cm^{3}[/tex].
The volume of the neutron star is
V=([tex]4\pi /3[/tex])×[tex]R^{3}[/tex]
V= [tex]25.72^{17} cm^{3}[/tex]
Now the density of the neutron star is
ρ = M/V
ρ = [tex]7.733[/tex]×[tex]10^{14}[/tex]g/[tex]cm^{3}[/tex]
The collapsing core of a large supergiant star with a total mass of between 10 and 25 solar masses—possibly even more if the star was very metal-rich—is what we refer to as a neutron star. Neutron stars are the tiniest and densest class of stellar objects currently known, with the exception of black holes and other hypothetical phenomena.
Although the galaxy may contain hundreds of millions of ancient neutron stars, only about 1,000 pulsars are known to exist. Although the enormous pressures found at neutron star cores may be similar to those at the moment of the big bang, conditions like this cannot be replicated on Earth.
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