Estimate the mass of the sun, assuning the orbit of Earth round the sun to be a circule. The disatnce between the sun and the Earth is `1.49 xx 10^(11) m`, and `G = 6.67 xx 10^(-11) Nm^(2) kg^(-2)`.

Explanation

`G(M_(s)M_(e))/(r^(2)) = M_(e) r ((2pi)/(T))^(2)` or `M_(s) = (4 pi^(2) r^(3))/(GT^(2))`
where, `r = 1.49 xx 10^(11) , G = 6.67 xx 10^(-11) N m^(2) kg^(-2)`
and `T = 365 xx 24 xx 60 xx 60 s`