Objects far from the center of the solar system (to the right on the horizontal axis) exhibit higher speeds, as indicated by the increasing numbers on the vertical axis, in accordance with Keplerian motion.
The rotation curve of the solar system, as described by Keplerian motion, depicts the speeds of objects in relation to their distance from the center. In this context, the vertical axis represents the speed of these objects, while the horizontal axis corresponds to their distance from the central point. Objects located far from the center of the solar system, particularly towards the right on the horizontal axis, display higher speeds, as evidenced by the increasing numerical values on the vertical axis.
This phenomenon aligns with Kepler's laws, specifically his second law, which states that a planet sweeps out equal areas in equal times, indicating that objects in orbit around the Sun move faster when they are closer to the central body. Therefore, the rotation curve illustrates the Keplerian motion, showcasing the relationship between the speeds of celestial objects and their distances from the center of the solar system.