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The distance of Barnard’s star is 1.83 pc and mass 0.135 M⊙. It has been suggested...

The distance of Barnard’s star is 1.83 pc and mass 0.135 M⊙. It has been suggested that it oscillates with an amplitude of 0.026′′ in 25 year periods. Assuming this oscillation is caused by a planet, find the mass and radius of the orbit of this planet.

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