SOLAR SYSTEM

Detailed explanation-1: -The orbit of earth around sun and orbit of all other planets are not circular but in stretched circles like oval. These shapes are called ellipses.

Detailed explanation-2: -The definition of an elliptical orbit is an oval-shaped path, like a slightly elongated circle. This is due to the gravitational interactions among the Sun, planets, and other celestial bodies that move in elliptical paths. All planets in our solar system have an elliptical orbit such as the orbit of Mars seen here.

Detailed explanation-3: -The elliptical nature of Earth’s orbit is due entirely to the original force which tossed it away from the solar disc (now the sun). If the momentum of this toss had been greater, the Earth’s orbit would have been more highly elliptical, or it might have been tossed completely out of the solar system forever.

Detailed explanation-4: -So what does this mean? Earth’s orbit is not a perfect circle. It is elliptical, or slightly oval-shaped. This means there is one point in the orbit where Earth is closest to the Sun, and another where Earth is farthest from the Sun.