How often do the stars move?

Stars appear to move across the night sky due to the rotation of the Earth on its axis, which causes them to rise in the east and set in the west. Over longer periods, stars also shift positions relative to one another due to their actual motion through space, a phenomenon known as proper motion. Additionally, the Earth's orbit around the Sun changes our perspective on nearby stars throughout the year. Therefore, while stars seem to move nightly, their positions change significantly over years and centuries.