According to sun’s quality and nucleus fusion reaction rate, the scientist estimated that sun the life which shines depending on the combustion hydrogen approximately may continue in 11 billion years, but the solar life has crossed about half (4.9 billion years). Based on the theory of planet evolution prediction After sun’s hydrogen becomes a minute perfect combustion completely, sun will inflate first for the red giant star, then has the nova to explode, but becomes a line of astroid nebula, to contract into the white dwarf after the gravity collapse again, and in light of this finally its life. The white dwarf is one kind by the degenerate state condition electronic constitution star, its volume reduces along with its increase of quality, therefore its quality has an upper limit, cannot increase above that limit.

The different quality of the star will be the end of his life in different ways. According to computation of general theory and quantum mechanics calculations, some qualities probably for the solar mass 3~10 times of big stars, the first inflation to the red giant stars, will then have the supernova to explode, then contracts the neutron star after the gravity collapse, finally its life. The neutron star is one kind the star which is constituted by the degenerate state neutron. Some quality bigger stars, after having the supernova explodes, then may cave in after the gravity becomes the black hole.

Black hole physics is a mathematical derivation has been on a singular point. According to theoretical calculations, black hole mass density are quite large, so even passing it around to attract a number of photons will be unable to continue to move forward. According to the recent astronomical observation’s result, the galactic center possibly has the black hole to exist. Because recently the physics circle confirmed grava existence finally, therefore possibly also has one kind between the black hole and neutron grava star the difficult adversary, grava the difficult adversary is one kind the star which grava star the institute is composed of the degenerate state.

How much the quality of star will become white dwarfs? How the quality of the star will turn into neutron stars? How the quality of the star will turn into a black hole? Actually, there is no any conclusion. The scientists can only determine approximately the white dwarf the quality cannot surpass approximately 1.4 times of solar masses (Chandrasekhar’s limit). The neutron star is about the quality of the upper limit of three times of the solar mass. Because of the star combustion emits the energy, therefore its quality steadily reduces, finally when has the nova detonation or the supernova detonation will lose a part of energy, therefore the estimate of its initial mass along with the different pattern, the difference is large. In addition, when the star at first forms, whether its component is the primitive hydrogen, or contained in other star wreckage heavy elements, these will affect the result which between the estimates initial mass and star life histories relates. Therefore, in the preceding text said: The quality approximately is sun 3 to 30 times of big stars, by neutron star finally its life. This “3 to 30 times” is only one approximately the value of estimate.