In the Northern Hemisphere, circumpolar stars appear to be circling Polaris, the North Star.

Here's why:

* Earth's Rotation: The Earth rotates on its axis, completing one rotation approximately every 24 hours.

* Earth's Tilt: The Earth's axis is tilted at an angle of about 23.5 degrees.

* Polaris' Position: Polaris is located very close to the celestial North Pole, which is the point in the sky directly above the Earth's North Pole.

Because of this alignment, from the Northern Hemisphere, Polaris appears almost stationary in the sky. All other stars in the northern sky appear to rotate around Polaris in a counter-clockwise motion, completing a full circle once every 24 hours. This is why circumpolar stars are called "circumpolar" – they circle around the celestial pole.