What is a Exoplanet?

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The following links as news report can be useful in making a note on this question.
The astronauts have recently been able photograph a star called Fomalhaut which is nearly 25 light years away having planets. The exoplanets or extrasolar planets are issue of interest because they may become the case of discovery of extra territerial life as the planets orbiting the other stars may also have life as it is here on the earth. It may be cause of proving theory of existence of aliens. (Fascinating!!!. I have doubt about including in the notes because it is highly based on theories. The only factor played in the favour of imaging of the distant plant in other star system by Hubble telescope after technological advancement in imaging.)

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BBC NEWS Science & Environment Exoplanets finally come into view

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http://www.efluxmedia.com/news_Researchers_Capture_First_Photo_Of_An_Exoplanet_Orbiting_A_Star_29045.html

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http://www.theregister.co.uk/2008/11/14/fomalhaut_b/

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Wikipeida Article on Extra Solar Planets with definition of Planet:http://en.wikipedia.org/wiki/Exoplanets

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