SOLAR SYSTEM

Detailed explanation-1: -Kepler’s Second Law Describes the Way an Object’s Speed Varies along Its Orbit. A planet’s orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves.

Detailed explanation-2: -Planets that orbit closer to the Sun than Earth have shorter years than Earth. Planets that orbit farther from the Sun than Earth have longer years than Earth.

Detailed explanation-3: -The further away from the Sun it is, the slower the planet’s orbital speed and the longer its path. Both of those factors result in taking longer to make one complete orbit and a planet having a longer year.

Detailed explanation-4: -A simple way to calculate moving from one circular orbit to a larger one: Start by increasing the speed. The orbit becomes an ellipse. As Kirby points out, the speed decreases as the satellite moves out.

Detailed explanation-5: -If the orbit has circular shape than its distance from sun will remain same and so speed will not vary much but in case of oval shape will be close to the sun at one point and far away from the sun at other point so the speed will vary lot.