. As shown in the figure, the star has entered the advanced life and the star center has formed an iron nucleus. Iron element continues to nuclear fusion , which can no longer heat up and can only absorb heat. This means that the internal iron nucleus can only obtain gravity potential energy through gravity contraction or compression, thereby heating the iron nucleus. The iron nucleus is heated to a certain level, and it has the temperature conditions of nuclear fusion.
iron nucleus and subsequent elements are thermal reaction no matter how nuclear fusion is , which is the gravitational potential energy that absorbs gravity contraction. This means that the iron nucleus does not have the possibility of heat expansion. It can only continue to shrink, the temperature continues to improve, continue to shrink, and the temperature continues to increase, so cycle. Soon, the iron nucleus area was reduced to the density level of white dwarf . At this time, the iron element has gathered into heavier elements.
plus external force squeezing, the electronic simplification is not enough to resist strong pressure, and it will inevitably shrink further. The level of elements outside the
iron nucleus will have a fierce nuclear fusion reaction and quickly open the supernova explosion operation. In addition to the iron nucleus and even the calcium layer other than the iron nucleus, after fusion becomes iron, the innermost part will be silent and gather with the iron nucleus. All the remaining substances will gradually throw out at a very high speed in the form of a ride. This process is accompanied by a strong light radiation , which is the outbreak of the supernova we see in the distance.
star in the late stages of the star, or before forming an iron nucleus, a supernova eruption occurred. Such a supernova explosion will be relatively thorough. The star material will be in the hierarchy. In the form of a high -speed ranceling, there is almost no surplus substance in the center. Born yourself out.
star quality If it is particularly large, when the supernova broke out, after the stars' iron nuclear central area formed a neutron star density material, the powerful neutron was not enough to counter powerful gravity squeezing. That is, when strong and strong interaction is not enough to compete for strong gravity, neutron will be crushed or further compressed, and the material of the center of the center of the star will be further contracted, and the gravity will be further stronger. The material shrinks to the Quark material density level. Quark's anti -squeezing ability should be stronger than that of neutron. I don't know how much it can be. When it reaches the density of Quark, it is already at the threshold of the black hole, and it can even be said to be a black hole. It's hard to imagine at this time.
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