Here's why:
* Polaris's brightness is inherent: The brightness of a star is determined by its intrinsic luminosity and its distance from Earth. Polaris has a specific brightness that doesn't change as you move on Earth.
* Apparent brightness remains constant: While you might *perceive* Polaris to be brighter when traveling north, this is simply due to the change in your perspective. As you go north, Polaris appears higher in the sky, and the atmosphere you're looking through is thinner, resulting in less light scattering and a slightly brighter appearance. However, the star itself is not actually getting any brighter.
Think of it this way: Imagine a light bulb in a room. If you walk closer to it, it appears brighter, but the light bulb itself isn't producing more light.
