What is the angular momentum of a planet moving on its orbit around the sun referred to?

The angular momentum of a planet moving in its orbit around the sun is specifically referred to as "orbital momentum." This term describes the momentum associated with an object's rotation around a central point due to gravitational forces. In the context of celestial mechanics, the angular momentum of a planet is a product of its mass, velocity, and the radius of its orbit, and it helps explain how the planet moves along its elliptical path.

The concept of orbital momentum incorporates both the mass of the planet and its motion through space, highlighting the influence of gravitational forces exerted by the sun. As the planet moves closer to or farther from the sun in its elliptical orbit, its angular momentum remains conserved, which is a principle resulting from the conservation of angular momentum in a closed system.

Understanding this concept is crucial for grasping how planetary bodies interact and maintain their orbits over time.