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- Greetings, everyone I am going to teach y'all about the birth and death of a small medium star, first a star forms in a nebula a cloud made up of hydrogen, helium, gases and dust to the center to make a star. The next stage is a protostar which is formed when the core becomes a dense spinning ball of gas, it then becomes a main sequence star when fusion begins. Our Sun=10 billion years in this phase. Fusion in the sun is where heat and light comes. In the next phase, it becomes a red giant when hydrogen runs out gravity will collapse the core the star is now hundred times bigger than before and it cools down and turns red. The fifth phase which is a planetary nebula where the inner core is still burning helium and fusing it into carbon until the helium is gone. Now we come to white dwarf which occurs when the core of the star is contracted and the matter is dense it turns when it gets hotter and when all the energy is gone no longer lives to give off light and this is the birth of the star, very shortly I will explain to y'all what happens to the star after its dead, see you later.
- Hello guys, now I'm going to tell you some facts about stars Okay let's begin. The life cycle of a star is determined by its mass. The larger the mass of a star the shorter will be its life cycle. The life of a star ranges from a few million years to a billion years, depending on the mass. It is believed that stars are born from collapsing dense clouds of dust and gas found in spiral galaxies.
- The black dwarf which is the final stage of the Sun-like star, when the sun burns all of its hydrogen to helium its core will shrink and it will rearrange itself and expand its outer layers to form a redgiant star. And that concludes the life cycled of a star from birth to death thanks for listening guys I'll see you nest time.
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