What is the radial-velocity method?

Asked on 20.10.2018 in All Questions.
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Also known as Doppler spectroscopy This method is indirectly used in finding exoplanets and brown dwarfs from radial-velocity measurements by the observation of the Doppler shifts in the spectrum of the planets parent star. This relies on the fact that a star does not stay completely stationary when it is orbiting a planet, it moves very slightly in a small ellipse shape responding to the gravitational pull of its smaller companion, these small movements affect the stars light spectrum. If the star...
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