科研之友
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<正>Neutrons were discovered 90 years ago by James Chadwick. The concept of neutron stars was hypothesized around that time by Lev Landau, Walter Baade, and Fritz Zwicky, and it was further developed by Richard Tolman, Robert Oppenheimer, George Volkoff,and other physicists. Neutron stars are astrophysical compact objects formed after the death of massive stars (more massive than our own Sun). According to current understanding, the typical mass of neutron stars is comparable to that of the Sun,
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