Here's why:
* Circumpolar Stars: These are stars that never set below the horizon from a given location. They appear to circle around the celestial pole.
* North Pole: At the North Pole, the celestial north pole is directly overhead.
* Celestial Equator: This is an imaginary line in the sky that is directly above the Earth's equator.
Since the celestial north pole is directly overhead at the North Pole, all stars north of the celestial equator will appear to circle around it, never setting below the horizon.