"As the planet rotates, the moon and stars appear to move across the sky just the way the sun does during the day. ... This means that if you view a group of stars one month, they'll appear in a different position one month later."
Earth Makes Star Positions Change and Constellations Are Not Constant
Explanation:
As the planet rotates, the moon and stars appear to move across the sky just the way the sun does during the day.
Stars that you see at night belong to the Milky Way galaxy. The sun sits on one of the galaxy's arms and rotates around the center of the galaxy. Other stars in the galaxy follow their own orbits as well.
