The maximum mass a neutron star can have before it undergoes gravitational collapse to a black hole. It is more difficult to estimate this limit than the analogous Chandrasekhar limit for white dwarf stars. It is thought that the Oppenheimer–Volkoff limit is between two and three times the mass of the sun. It was first calculated by Robert Oppenheimer and George Volkoff in 1939.
Subjects: Astronomy and Astrophysics — Physics.