The Life of Stars

The stars are born in our atmospheric dust clouds and cyclones. Turbulence in these clouds creates enough gravity between the gas and dust to collapse it, and it becomes denser and moves further into the cloud. The cloud continues to collapse and collects dust and gas around the hot center called the original star. (Http://science.nationalgeographic.com) Although protosters are not hot enough to emit visible light at an early stage, they emit infrared light.

By observing thousands of photographs and using some basic physics, astronomers developed a sequence of star birth, life and death (see Sequence Star Lifecycle Page - Massive and Sunlike) . The pictures start with gas and dust among many stars, mainly hydrogen. Due to incomplete understanding of astronomers these clouds began to collapse and began to heat under their own gravity. These primitive stars ultimately become dense enough to maintain nuclear reaction (hydrogen becomes helium), stars are born.

Welcome to the newborn 's life. The main sequence star is a series of stars based on size and surface temperature, from bright and blue shining stars in the upper left corner of the H - R chart to cold, dark and red stars in the lower right corner of the chart. The new star's life begins with the main flow. These mature stars experienced significant changes after consuming all the hydrogen in their cores. When hydrogen is consumed, stars expand away from the main line and form a red gigantic star. At this new stage, heavy elements such as oxygen and carbon begin to form by fusion of enamel. The expansion - collapse - expansion process of this star forms a light element present in the universe (until Fe)

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.

The black hole is actually a mere evolutionary end of a massive star. In order to become a black hole, this star must be 10 to 20 times the mass of the sun. In the life of the star there is a constant struggle between gravity pull and pressure push. The nuclear reaction of the star nucleus creates outwardly propelled energy. When a star starts to run out of nuclear fuel, gravity takes over and contracts the substance by its own weight. The bigger the star, the greater the gravity. This star is actually collapsing under its weight. When a star uses the final fuel source it explodes to a supernova and expels the outer part to the universe. There is no force to push back to the core to prevent the core from shrinking into the black hole due to gravity. The volume of the core / black hole is zero and the density is infinite, which is called singular point (Steinberg)