The behavior of nuclear matter is considered from the standpoint of the discovery of six-quarks. The results are applied to calculations of parameters of neutron stars. It is shown that the maximum masses and radii of neutron stars decrease and that there may exist ultrahigh-density objects of very small masses. A new mechanism is proposed to explain explosions of supernovae of the first type. It is demonstrated that in the process of collapse a star passes through a stage of instability leading to an explosive release of energy.
Department of Quantum Theory and High-Energy Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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