Question

Q4) Why do planets never change their orbits?
Ans:-​

Answer 1

Answer:

The motions of the planets are governed by the forces acting on them. The largest of these forces is the sun's gravity, which keeps the planets in their orbits. If no other forces were involved, then orbits would never change.

Explanation:

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Answer 2

Answer:

If the Sun and Earth were the only things in the solar system, our planet's orbit would be an ellipse of virtually constant shape and orientation in space. However, because the other planets pull on Earth, our orbit does change slightly over time, in orientation and in shape.