Supernova 1987A

Mechanisms of stellar bursts in different types of supernovae are explained. Remarkable results of 1987A Suprnova observations are presented. It is discussed which object was generated by this Supernova-neutron star or black hole. Results of interferometry revealing a secret close object which possibly moves only twice as slowly as light are considered. 1987A supernova presented a lot of results on neutrino, interesting for particle physics. Possible prospects by work on supernovae as well as works with neutrino detectors and gravitation waves are considered. Agreement between the quantity, energy and neutrino recording time and theory of 2-type supernovae producing a neutron star during gravitational collapse, is present. This is the beginning of neutrino astronomy. The blue supergiant and not the red one appeared to be 1987A SN presupernova. A conclusion can be drawn that the presupernova was a star its mass being 15-20 solar ones which then lost about half of its mass for 106 years at the expense of solar wind. Although the larger part of hydrogen was cleared away and became pre-star substance, a part of its quantity was preserved up to the moment of supernova explosion