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Short Note

**Answer the following question in detail.**

State Kepler’s three laws of planetary motion.

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#### Solution

**1. Kepler’s law of orbits:**

**Statement: **

All planets move in elliptical orbits around the Sun with the Sun at one of the foci of the ellipse.

**2. Kepler’s law of equal areas:**

**Statement: **The line that joins a planet and the Sun sweeps equal areas in equal intervals of time.

**3. Kepler’s law of periods:**

**Statement: **The square of the time period of revolution of a planet around the Sun is proportional to the cube of the semimajor axis of the ellipse traced by the planet.

Concept: Kepler’S Laws

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