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How will you weigh the sun, that is esti...

How will you weigh the sun, that is estimate its mass ? The mean orbital radius of the earth around the sun is `1.5 xx 10^8 km.`

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The planet Mercury revolves around the sun once in 88 days. If the mean distance between the earth and the sun is 1.5 xx10^8 km , what is the mean distance of Mercury from the sun ?

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