stars1 Have you ever looked up at the sky and wondered what be those bright and shiny things up there. Stars: a natural luminious dead body visible in the sky especially at night. A self-luminious gaseous celestial body ofgreat mass which produces energy by means of nuclear fusion reactions, whose shape is usually spheroidal, and whose come may be as small as the adult male or larger than the earth?s orbit. Galaxies: Any of the go large groups of stars and associated matter that are embed throughout the universe.
In 1802, William Wollaston noted that the spectrum of sunlight did not appear to be a c ontinious band of colors, but rather had a series of sullen lines superimposed on it. Wollaston attributed the lines to natural boundaries between colors. Joseph Fraunhofer made a more careful set of observations of the solar spectrum in 1814 and rear some 600 dark lines, and he specifically measured the wavelenght of 324 of them. many a(prenominal) of the Fraunhofer lines in the solar spectrum retain the n...If you want to get a full essay, order it on our website: BestEssayCheap.com
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