NEETprep Helpline
8.13 How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 × 108 km.
Here,r=1.5×108km=1.5×1011mT=1year=365.25days=365.25×24×60×60s.G=6.67×10-11Nm2kg-2Wehave,M=4π2r3GT2=4×3.142×1.5×101136.67×10-11×365.25×24×60×602=2×1030kg.
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