The Realm of Extrasolar Planets

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Planetary Atmospheres, Extrasolar Planets, Spectrographs, Photometry, Planetary Nebulae, Other Topics On Stars, Spectroscopy And Spectrophotometry, Photography And Photometry

Scientific paper

In November 1995, an article published in Nature [1] put planetary sciences not only as a new hot field in both observational and theoretical astrophysics but also as a topic with a large impact toward the layman. This article was reporting the first discovery of a planet orbiting a star beyond our Sun, namely the solar-type star 51 Pegasi. Nearly four centuries after Giordano Bruno was burnt in public in Roma partly for having intuitively claimed the plurality of worlds, we were entering the extraordinary epoch in which one of the oldest inquiries of mankind-are we alone in the Universe?-can be tackled with the scientific method, leaving aside centuries of endless speculations. To date (July 2010), almost 500 extrasolar planets are known. We shall briefly review the main detection methods, together with the big surprises which arose during these last exciting fifteen years, without being exhaustive.

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