$\"\"$

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(a)

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The diameter of the Sun is $\"\"$ .

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Observe the diagram length of the major axis is $\"\"$ .

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The value of $\"\"$ is half of the length of the major axis.

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$\"\"$ .

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The value of $\"\"$ is $\"\"$ .

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The distance from the focus of the sun to the vertex is $\"\"$ .

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The value of $\"\"$ is distance between focus to the centre.

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The distance between focus to the centre is $\"\"$ .

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The value of $\"\"$ is $\"\"$ .

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Find the value of $\"\"$ .

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$\"\"$ .

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Substitute $\"\"$ and $\"\"$ in the above equation.

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$\"\"$

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Length of the minor axis is $\"\"$ .

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$\"\"$

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Thus, the ength of the minor axis is $\"\"$ .

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$\"\"$

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(b)

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Find the eccentricity of the elliptical orbit.

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Eccentricity of the elliptical orbit : $\"\"$ .

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$\"\"$

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Thus, eccentricity of the elliptical orbit is $\"\"$ .

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$\"\"$

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(a) The ength of the minor axis is $\"\"$ .

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(b) The eccentricity of the elliptical orbit is $\"\"$ .