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Question
State Kepler’s three laws.
Solution
- Law of orbits: Each planet revolves moves around the Sun in an elliptical orbit with the Sun at one of the foci of the ellipse.
- Law of area: The radial vector line joining the Sun to a planet sweeps equal areas in equal intervals of time.
- Law of period: The square of the time period of revolution of a planet around the Sun in its elliptical orbit is directly proportional to the cube of the semi-major axis of the ellipse.
T2 α a3
`"T"^2/"a"^3` = constant
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