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A Star's Life Cycle
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Summary
The concepts of stars and planets have always caught the imagination and fancy of human kind. Astronomer Michael Shera enlightens us to the fact that stars follow the lifecycle of human beings; that is to say that they take birth, age, evolve and die in the same manner as human beings do. It begins with the gravity gathering hydrogen and other particles of dust and the clouds growing denser. As the clouds squeeze up, hydrogen gets heated up to extremely high temperatures and the process of nuclear fusion takes place. At such high temperatures and pressures, hydrogen gets converted to helium and a star is born. When a star runs out of its hydrogen, it starts to disintegrate and the force of gravity pulls the core harder resulting in the blowing up of the outer layers of the stars. The only thing that remains is the dense solid core which is known as a white dwarf. Some very high energy stars called as supernovas on disintegration turn into neutron stars that are far denser than white dwarfs. Some enormous supernovas also turn into black holes.
Related Video: http://www.youtube.com/watch?v=FSEA5_br7J0
Keywords: clouds, dust, gases, gravity, hydrogen, nuclear fusion, helium, stars, Astronomer, Michael Shera, Sun, solar system, galaxy, super novas, white dwarfs, black holes, neutron stars
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