Titlebook: Exoplanets; Finding, Exploring, Chris Kitchin Book 2012 Springer Science+Business Media, LLC 2012 Astrometry new planets.Discovering new p

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Cursory

,In the Beginning – The First Exoplanet Discoveries, low mass and very faint compared with its host star and it is right next door to that host star. So if you try to look for the exoplanet directly, its light will be swamped by that emitted by the star. If you try to detect the star changing its position in the sky as the exoplanet moves around it,

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,On the Track of Alien Planets – The Radial Velocity or Doppler Method (～70% of All Exoplanet Primarocity changes of a few metres per second. Although 51 Peg b and some other exoplanets have been discovered using relatively conventional spectrographs, most exoplanets have been found using spectrographs equipped with absorption cells.

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,On the Track of Alien Planets – Direct Imaging and Observation (～2.9% of All Exoplanet Primary Discdirect observation is biased towards detecting exoplanets that are a long way out from their host stars. Thus the orbital radii of those directly observed exoplanets currently known ranges from at least 4 to nearly 700 AU – several thousand times further from their host stars than most of the exopla

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,Where Do We Go from Here? – Future Approaches to Exoplanet Detection and Study, the subject is changing towards studying the details of the individual planets and trying to understand their properties as a group. Of course, efforts to discover new exoplanets will continue alongside these follow-up studies of already known exoplanets and one important aim must be to reduce the

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,Exoplanets Revealed – What They Are , Like,l/large – solid/gaseous – hot/cold – atmosphere/no atmosphere – rocky/icy – etc. When we add dwarf planets, asteroids, natural satellites, comets, Kuiper belt objects and the rest, the variety becomes truly amazing. Yet the solar system is just 1 of 400 now discovered planetary systems – most of whi

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