SOLAR SYSTEM

Detailed explanation-1: -They describe how (1) planets move in elliptical orbits with the Sun as a focus, (2) a planet covers the same area of space in the same amount of time no matter where it is in its orbit, and (3) a planet’s orbital period is proportional to the size of its orbit (its semi-major axis).

Detailed explanation-2: -Kepler’s third law-sometimes referred to as the law of harmonies-compares the orbital period and radius of orbit of a planet to those of other planets.

Detailed explanation-3: -Kepler’s First law: Every planet revolves around the Sun in an elliptical orbit and Sun is situated at one of its two foci. It is also termed as ‘the Law of Orbits’.

Detailed explanation-4: -While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits.

Detailed explanation-5: -According to Kepler’s law of periods, ‘’The square of the time period of revolution of a planet around the sun in an elliptical orbit is directly proportional to the cube of its semi-major axis”. The shorter the orbit of the planet around the sun, the shorter the time taken to complete one revolution.