As many people already know, the sun is a star. Many people also know that the sun will one day die, and we can no longer live on Earth. Not many people know why this will happen. The reason is the star cycle. A star's death and birth is a cycle that resembles a cycle on Earth. For example, a butterfly starts out as an egg, becomes the larva, turns into the pupa, becomes a butterfly, and they lay eggs. Stars goes to a similar cycle. It starts out as a nebula, a clustering of dust and other small things in space. If the nebula is average, it will become an average star like our sun. Nuclear fusion starts and creates energy, which reaches us as light. Nuclear fusion is the process of which atoms are combined. Stars start off with only hydrogen. when they fuse, they become helium. As nuclear fusion continues the star gets heavier and the core is more dense. Once the core becomes too heavy, the gravity of the star loosens. It expands to a red giant. It will destroy the planets closest to it. The energy will drift out and form the planetary nebula. These energy will meet up with other energy to form another star. Meanwhile, the star will shrink to a white dwarf. Then the energy will run out and become a black dwarf. The same thing happens with massive stars. Instead of making a planetary nebula, it will make a supernova, the worst explosion in the world. It can then become a black hole or a neutron star. A black hole is dangerous and even light can not escape. The neutron star is dangerous even from a long distance. The sun goes through a cycle just like everything on Earth. After all, it is the source of living things.
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Corey YangI am a seventh grade AEP student. I love math and logical problems. I want to be a lawyer or a detective when I grow up. Archives
May 2017
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