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(b) The nearest star to the Sun is Proxima Centauri. This star has a mass of 2.5 x 102kg and is a distance of 4.0

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(b) The nearest star to the Sun is Proxima Centauri. This star has a mass of 2.5 x 102kg and is a distance of 4.0 * 1013km from the Sun. The Sun has a mass of 2.0 x 1030kg. (i) State why Proxima Centauri may be assumed to be a point mass when viewed from the Sun. [1]

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