How many levels are there in the orbit of a star?

Level three. The skills are as follows (at least the level should be marked): star orbit level 3, star penalty level 3, star setting level 3, star boundary 1. The orbit of a star is the orbit of continuous motion produced by a star in a long-time exposure picture. In other words, the camera does not track the movement of stars in the night sky. On the contrary, the camera position remains unchanged, and the star itself moves with time. The resulting picture shows the trajectory of the stars under the night sky.