The universe is so profound, why are the nine planets of the solar system arranged in such an orderly and regular rotation and rotation? With the star sun as the center, the Earth has four seasons, a satellite moon, and the Earth also has day and night differences, as well as the lunar calendar's first and fifteenth, the theory of the moon's absence and full moon. In addition to the solar system, there is a larger Milky Way, as well as the unsolved black hole and the black hole inside the black hole. "Starry sky" describes my understanding and longing of the vast universe.