The life cycle of stars is explained in this video. The Star life cycle is determined by its mass. The larger its mass, the shorter its life cycle. Although stars may seem like permanent fixtures in the sky, they are actually very dynamic objects. Stars grow old and die, while new stars are being formed all throughout the universe, such a process explained through the life cycle of a star flowchart. Watching full video help to understand the basic star life cycle. Well, a star initiates the life cycle as a large cloud of gas. The temperature inside the cloud is low enough for molecules to form. Some of the molecules, such as hydrogen, light up and allow astronomers to see them in space. Stars are formed in clouds of gas and dust, known as nebulae. Nuclear reactions at the center of stars provides enough energy to make them shiny for many years. The life cycle of stars depends very much on their size. Very large, massive stars burn their fuel much faster than smaller stars, but smaller stars, however, will last for several billion years, because they burn their fuel much more slowly.
Again, the life cycle of stars begins in the same way. A cloud of dust and gas, also known as a nebula, goes on to become a main-sequence star. Following this, stars develop in different ways depending on their size.
Stars that are a similar size to the Sun follow the left-hand path:
Red giant star → white dwarf → black dwarf
Stars that are far greater in mass than the Sun follow the right-hand path:
Red supergiant star → supernova → neutron star, or a black hole.
The Main Sequence is where stars spend most of their lives. Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main-sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. However, the hydrogen fuel that powers the nuclear reactions within stars will begin to run out, and they will enter the final phases of their lifetime. Over time, they will expand, cool, and change color to become red giants. The path they follow beyond that depends on the mass of the star. Small stars, like the Sun, will undergo a relatively peaceful death that sees them pass through a planetary nebula phase to become a white dwarf, which eventually cools down over time and stops glowing to become a so-called "black dwarf". Massive stars, on the other hand, will experience a most active and violent end, which will see their remains scattered about the cosmos in an enormous explosion, called a supernova. Once the dust clears, the only thing remaining will be a very dense star known as a neutron star, these can often be rapidly spinning and are known as pulsars. If the star which explodes is especially large, it can even form a black hole. The life cycle of the sun began roughly 4.6 billion years ago and will continue for about another 4.5 – 5.5 billion years, when it will deplete its supply of hydrogen, helium, and collapse into a white dwarf. There are many Stages of a Star life cycle. A number of the objects we see in the sky are not stars, but the remains of stars that have died.
Well, there are huge star life cycle animations, simulations, and documentaries available on the web. The life cycle of a star with a flowchart is explained in this video.
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