Answer:
A celestial body was generally considered to be a planet or wanderer if it appeared to move independently from other celestial objects in the night sky, rather than simply following a fixed path. This characteristic of movement is known as "wandering" or "planet" motion. It is believed that this was the main factor that distinguished planets from other celestial bodies, such as fixed stars. Therefore, the primary characteristic that earned a celestial body the distinction of planet or wanderer was its apparent independent motion.