The birth of a star is a process completely fueled by gravity (“Life”). All stars are born in something called a nebula, which is essentially just a cloud of gas and dust. Dr. Michelle Thaller, stated on the documentary How The Universe Works, “All you need to make a star is hydrogen, gravity, and time.” The clouds of gas and dust start to churn rapidly, causing clumps of matter to form. Once the correct mass is reached, they condense under their own gravitational pull and heat up. This clump of matter is known as a protostar (“Stars”). As time progresses, the cloud thickens and starts to spin, a stage that can take hundreds of thousands of years. Gravity will then start to crush the matter into a very hot and dense sphere. Eventually, the pressure that gravity applies upon the sphere causes jets of hot gas to extend out into space. This pressure also causes the star to consume more gas and matter, which only accelerates the heat up process. At the temperature of fifteen million degrees, atoms of gas fuse together, releasing energy, and activating the star (“Extreme”). However, this is not always the case. If a clump of ma...
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Redd, Nola T. "Main Sequence Stars: Definition & Life Cycle." Space.com. TechMedia Network. 13 Aug. 2013. Web. 1 Dec. 2013.
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