The Process of The Life Cycle of A Star

Professor Lawrence Krauss said, "Our galaxy has more than 100 billion stars." Each of these stars is a factory ("star") that slowly builds materials for the universe. Stars are as diverse as people. They were born in the same way, but they did not all die in the same way. Some stars are very young to live quickly; others slowly and quietly die ("extreme"). The life cycle of a star is intense, it generates flow, pulsation and sometimes explodes, but its life products are precious cornerstone of the universe.

On the right side of the figure there is a huge star life cycle (more than ten times the size of the sun). Like low mass stars, high quality stars are born in the nebula, evolve, and survive in the main line. However, after the Red Giant stage, their lifecycle begins to be different. An explosion of a superstar occurs in a huge star. If the rest of the explosion is 1.4 to 3 times that of the sun, it will be a neutron star. The center of a massive star with more than three times the mass of the sun after the explosion will be completely different. Gravity overcomes the nuclear forces that prevent protons and neutrons from combining. Therefore, the core is swallowed by its own gravity. It now easily becomes a nearby one and a black hole attracting energy. What happens between the red giant stars and the supernova explosion is as follows.

When a huge star collapses at the end of its lifecycle, it is expected to form a star hole mass black hole. After forming the black hole, it can continue to grow by absorbing mass from the surrounding environment. By absorbing other stars and fusing them with other black holes it is possible to form millions of solar mass (M☉) massive black holes. It is widely believed that super mass black holes exist in the center of most galaxies. Although not visible inside, the existence of black hole can be inferred by interaction with other substances and electromagnetic radiation such as visible light. The substance falling in the black hole forms an external accretion disk heated by friction and forms some of the brightest objects in the universe. If other stars orbit around the black hole, you can use those trajectories to determine the quality and position of the black hole. These observations can be used to exclude possible substitutes such as neutron star.

Black hole is a natural result of general relativity, essential to astronomy to understand the life cycle of stars and galaxies. They have driven us to accept strange concepts in the past; they will see if they lead us to new physics in the future. At the same time, they are one of the most interesting ones among destructive creators of astronomy, beauty and miracles.