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Are we alone in this universe Does life exist in other planets These are the kind of questions that are yet to be answered Within the last 100 years scientists have shown remarkable advancement in space science Millions of dollars are gone and a lot of time has been spent to answer the above questions Space telescopes have brought us pictures of unknown planets that might have some indication of life like that of the Earth But we are unfortunate to say that out of the nine neighbor planets life exists only on Earth What is magical about Earth that makes life possible here Theres lot of scientific details that concludes the reason of life here The rate of Oxygen compared to other gases in our atmosphere the distance between sun and the earth water pressure gravity etc everything seems to be in such a balance so as to bring and bear life here The scientists of today are actually in search of such planets that matches certain criterion with the earth so as to ensure the possibility of life So far telescopes havent been successful in bringing clear and accurate pictures of distant planets Here distant planets refer to planets of different solar system Hence Astronomers have to bring about a different technique to solve this problem One such technique that is developed recently is called spectroscopy Light coming out of a planet could tell researchers about the nature of the planet Different characteristics of the planet could be studied and different conclusions can be drawn as to the questions of life and existence One of the basic things that could be studied is the temperature of the planet If a planet is very close to a hotter and brighter star then temperature would obviously be high enough to make life unbearable there Moreover gases that stands on the planets atmosphere could also be studied through the technique of spectroscopy Our mother earth
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