Final answer:
Celestial objects rise in the east and set in the west due to the rotation of the Earth.
Step-by-step explanation:
The reason celestial objects rise in the east and set in the west is because of the rotation of the Earth. The Earth rotates on its axis from west to east, causing celestial objects to appear to move from east to west in the sky. This rotation brings different stars into view as it turns, creating the illusion of rising and setting. For example, if you watch stars throughout the night, you will see that most of them rise to the east of you and set to the west of you, just like the Sun and Moon.