Question

b.
If the orbit of revolution were not elliptical but circular
Please explain briefly

Answer 1

Answer:

Orbits are elliptical because of Newtons Law of Gravity (bodies attract each other in proportion to their mass and inversely proportional to the square of the distance between them). All worked out by Kepler some years ago. A circular orbit is a special (and very unlikely) case of an elliptical orbit.

Also, the reason for a planet's elliptical orbit is down to the gravitational attraction between the central Sun and all the other planets in the solar system

Explanation:

A circle is a special case of an ellipse with the major and minor axes equal. To get a perfectly circular orbit of a certain radius requires the planet to have a certain velocity, which is extremely unlikely.

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