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The Question (Submitted November 12, 1996) I was looking on the Internet for in ashesation on the opus of stars and was not strikeing some(prenominal) in playation. I looked at a site you put to take outher and thought maybe you capability know where I can baring whatever effective information. If you bedevil the opportunity I would appreciate any booster you might pick out. The Answer The area you are interested in, the written report of stars, is a very important and interesting field for astronomers. It touches on many related questions, such as how do stars form? How do stars shine? Why are the amounts of different elements in the Universe the percentage that they are? It is not easy to find WWW references simply on chemic composition of stars, that if you pick one of the related areas of interest to you then it is tractable to find some information about this on the WWW. Stars commence their life when an ordinary dense cloud of interstellar egres s becomes unstable and begins to collapse. The composition of such a cloud of meditate determines the composition of the star which results from the collapse. Lets start by looking at the chemical substance composition of the star we know the most about, our insolate. Astronomers upshot the spectrum of the Sun to determine its chemical composition. In the visible terra firma alone, from 4000 to 7000 angstroms (10-10 meters), there are thousands of absorption lines in the solar spectrum.

These lines have been cataloged, and tell us that there are 67 chemical elements identified in the Sun. There are probably tied(p) more than elements in the Sun that are pre! sent in such a small amount that our instruments cant detect them. present is a table of the 10 most common elements in the Sun: Element Abundance (% of sum Abundance be of atoms) (% of total mass) Hydrogen 91.2 71.0 Helium 8.7 27.1 Oxygen 0.078 0.97 Carbon 0.043 0.40 northward 0.0088 0.096 atomic number 14 0.0045 0.099 Magnesium 0.0038 0.076 Neon 0.0035 0.058 Iron 0.030 0.014 Sulfur 0.015...If you compulsion to get a full essay, order it on our website: OrderCustomPaper.com

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