What is an orbit characterized by having a constant radius called?

What is an orbit characterized by having a constant radius called?

• A. Elliptical orbit
• B. Circular orbit
• C. Parabolic orbit
• D. Hyperbolic orbit

Answer: (B)

A circular orbit is characterized by a constant radius, which means that the distance from the center of the central body (like a planet or star) to the orbiting object remains the same throughout the entire orbit. This is in contrast to other types of orbits, such as elliptical orbits, where the distance from the central body varies as the object moves along its path. In a circular orbit, the gravitational force acting on the orbiting object provides the necessary centripetal force to keep it moving in a circle at a constant speed. This uniformity in distance and speed is what defines the aspect of having a constant radius. Parabolic and hyperbolic orbits describe paths that are open and not closed, leading to varying distances from the central body as well. Thus, the defining feature of a circular orbit is the maintenance of a fixed radius throughout the motion.

A circular orbit is characterized by a constant radius, which means that the distance from the center of the central body (like a planet or star) to the orbiting object remains the same throughout the entire orbit. This is in contrast to other types of orbits, such as elliptical orbits, where the distance from the central body varies as the object moves along its path.

In a circular orbit, the gravitational force acting on the orbiting object provides the necessary centripetal force to keep it moving in a circle at a constant speed. This uniformity in distance and speed is what defines the aspect of having a constant radius. Parabolic and hyperbolic orbits describe paths that are open and not closed, leading to varying distances from the central body as well. Thus, the defining feature of a circular orbit is the maintenance of a fixed radius throughout the motion.