Here's why:
* Earth's Rotation: The Earth rotates on its axis, causing the apparent movement of stars across the sky.
* Latitude: Your location on Earth's surface (latitude) determines which stars you can see and which ones are always above the horizon.
* Circumpolar Stars: Stars located within a certain distance from the celestial pole (the point directly above your location) will appear to circle around it, never dipping below the horizon.
For example:
* At the North Pole, all stars are circumpolar because they all circle around the celestial north pole.
* As you move further south, fewer stars become circumpolar.
* At the equator, there are no circumpolar stars because the celestial poles are on the horizon.
The most famous circumpolar star in the Northern Hemisphere is Polaris (the North Star). It's located very close to the celestial north pole, making it appear nearly stationary in the sky.
