Estimate the mass of the sun, assuming the orbit of the earth round the sun to be a circle. The distance between the sun and earth is `1.49 xx 10^(11) m` and `G = 6.66 × 10^(-11) Nm^(2)//kg^(2)`.

Explanation

To estimate the mass of the Sun, we can use the gravitational force and the centripetal force acting on the Earth as it orbits the Sun. Here’s a step-by-step solution:

### Step 1: Understand the Forces
The gravitational force \( F_g \) between the Sun and the Earth is given by Newton's law of gravitation:
\[ F_g = \frac{G M m}{d^2} \]
where:
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