Newton's Laws of Motion can be used to describe the motion of planets. These laws state:
An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an unbalanced force.
The acceleration of an object is directly proportional to the magnitude of the force applied, and inversely proportional to the mass of the object.
For every action, there is an equal and opposite reaction.
Using these laws, astronomers and physicists can make predictions about the motion of planets and other celestial bodies. For example, Newton's First Law can be used to explain why planets continue to orbit around stars, and why they move in a specific path instead of flying off into space. Newton's Second Law can be used to calculate the force of gravity between planets and stars, which determines their acceleration and velocity.
Finally, Newton's Third Law can be used to explain how planets and other celestial bodies interact with one another, such as how they influence each other's orbits. This helps to understand why planets sometimes experience changes in their paths and movements, such as when they are pulled or pushed by other celestial bodies.
Overall, Newton's Laws of Motion provide a framework for describing and predicting the motion of celestial bodies, and continue to play a critical role in our understanding of the universe.