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Life cycle of stars essay
Stars formation and existence
Life cycle of stars essay
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Professor Lawrence Krauss claims that, “In our galaxy, there are over 100 billion stars alone.” (“Extreme”). Each one of those stars is a factory which slowly builds the materials for the foundations of the universe (“Stars”). Stars are as varied as people. While they are all born the same way, they do not all die the same way. Some stars live fast and die young; others die slowly and quietly (“Extreme”). The life cycle of a star is violent, they churn, pulsate, and sometimes explode, but the products of its life are invaluable building blocks for the Universe. There is a process to the life cycle of a star.
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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.... 10 May 2010. Web. 16 Dec. 2013. .
"The Life and Death of Stars." National Aeronautics and Space Administration. 16 Apr. 2010. Web. 2 Dec. 2013. .
Redd, Nola T. "Main Sequence Stars: Definition & Life Cycle." Space.com. TechMedia Network. 13 Aug. 2013. Web. 1 Dec. 2013. .
"Star (astronomy)." Encyclopedia Britannica. 5 May 2013. Web. 21 Feb. 2014. .
"Stars." National Aeronautics and Space Administration. 30 Apr. 2013. Web. 4 Dec. 2013. .
Thompson, Andrea. "What Is a Supernova?" Space.com. TechMedia Network. 4 May 2010. Web. 1 Dec. 2013. .
middle of paper ... ...2014. The 'Standard' of the 'Standard'. The "NASA History" Congressional Digest 90.7 (2011): 196-224. Academic Search Premier -. Web.
The two astronomers found many patterns after developing their graph. They found that 90% of stars graphed fell within a band that ran through the middle of the graph. These stars range from cool, dim, red stars at the lower right of the H-R Diagram to hot, bright, blue stars at the upper left corner of the H-R Diagram. The stars that fall into to this band are known as main-sequence stars. Stars such as the sun, and almost every start visible in the night sky fall within this band of main sequence stars. There is another group of stars which are cool and bright that appear near the upper right corner of the H-R Diagram.
...f gas, which collapsed and broke up into individual stars. The stars are packed together most tightly in the center, or nucleus. Scientists believe it is possible that at the very center there was too much matter to form an ordinary star, or that the stars which did form were so close to each other that they coalesced to form a black hole. It is argued that really massive black holes, equivalent to a hundred million stars like the Sun, could exist at the center of some galaxies
Dyson, Marianne J. Space and Astronomy: Decade by Decade. New York: Facts on File, 2007. 14+. Print.
The American scientist John Wheeler coined the phrase “black hole” in 1969 to describe a massively compact star with such a strong gravitational field that light cannot escape. When a star’s central reserve of hydrogen is depleted, the star begins to die. Gravity causes the center to contract to higher and higher temperatures, while the outer regions swell up, and the star becomes a red giant. The star then evolves into a white dwarf, where most of its matter is compressed into a sphere roughly the size of Earth. Some stars continue to evolve, and their centers contract to even higher densities and temperatures until their nuclear reserves are exhausted and only their gravitational energy remain. The core then rushes inward while the mantle explodes outward, creating neutron stars in the form of rapidly rotating pulsars. Imploding stars overwhelmed by gravity form black holes, where the core hits infinite density and becomes a singularity (some estimate it at 10^94 times the density of water).
Stars are born and reborn from an explosion of a previous star. The particles and helium are brought together the same way the last star was born. Throughout the life of a star, it manages to avoid collapsing. The gravitational pull from the core of the star has to equal the gravitational pull of the gasses, which form a type of orbit. When this equality is broken, the star can go into several different stages. Some stars that are at least thirty times larger than our sun can form black holes and other kinds of stars.
Schwarz, Fred. “Not our Stars but Ourselves.” Naitonal Review Vol. 61, Nov 3 Feb 23 2009: 22-4.
Tyler, Pat. Supernova. NASA’s Heasarc: Education and Public Information. 26 Jan. 2003. 22 Nov. 2004
Shklovskii, Iosif S. Stars: Their Birth, Life, and Death. Moscow: Central Press for Literature in Physics and Mathematics, 1975.
Supernovas are extremely powerful explosions of radiation. A supernova can give off as much energy as a Sun can within its whole life. A star will release most of its material when it undergoes this type of explosion. The explosion of a supernova can also help in creating new stars.
Human fascination with the stars is as ancient as Babylonians and has been suggested to be older than Stonehenge. From “be fruitful and multiply” to “live long and prosper,” the instinct to protect and propagate the species has manifested in religion, art, and the imaginations of countless individuals. As human understanding of space treks out of the fantastical and into the scientific, the realities of traveling through and living in space are becoming clearer. Exploring, investigating, and living in space pose an expansive series of problems. However, the solutions to the problems faced by mankind's desire to reach beyond the horizon, through the night sky, and into the stars are solutions that will help in all areas of life on Earth.
The Star by H. G. Wells is a story about the near destruction of the human race, but more than that, it is a story about the selfishness of the human race. During this story, people have the chance to see many world changing events that could even effect the very construction of our solar system, but they don’t care. They are too busy living their lives and dealing with daily problems that something like the destruction of a planet is overshadowed by what is for dinner tonight. A great example of this apathetic attitude, is shown soon after the star’s first appearance.
The education system in India is based on forced learning that kills student’s spirit and zest of learning. In the film “Like Stars on Earth,” we look specifically at the draw backed role played by parents and teacher in Indian education system. We follow the story of a dyslexic Indian boy, Ishaan, who always had trouble coping with his studies, but in the end with the help of an understanding teacher he is able to study normally and catch up with his peers. We will analyze this film using the concepts from Practices of Looking to explain our thesis. Eddie will cover the concepts of encoding and the ideology surrounding Indian education; Kiranjot Singh will explain the concepts of punctum, negotiated reading and producer’s intended meaning;