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How can astronomers use the Doppler Effect to detect the presence of an exoplanet around a...

How can astronomers use the Doppler Effect to detect the presence of an exoplanet around a star? Try to be as clear as possible about what is measured and how that is interpreted.

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Doppler effect is a technique for discovering exoplanets as it is used to analyze the motion and properties of stars and planets. Both these are orbiting a common centre of mass that means the stars and planets are gravitationally one other causing them to orbit around a point of mass central to both the bodies. The relative speed of stars moving towards or away from the sun as detected through the doppler effect which gives clue to the suns motion through the milky way galaxy as well as other information about the motion of stars that includes its cluster and as gas clouds in space.

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