Polaris Aa

Polaris Aa (Pole Star) is a Yellow Supergiant and the northern pole star of Earth, and since its bright and close to the pole, Its very useful for celestial navigation.

Space
Polaris is a Yellow Supergiant that has evolved out of the main sequence, It's also a Classical Cepheid, with pulsations in apparent magnitude from 1.86-2.13 between 3.97 days. It also has a companion that orbits around it in 30 years. It's located 323-433 light years away from Earth.

Stargazing
Polaris is the most useful and important star in celestial navigation, Due to its proximity near the north celestial pole, It's also circumpolar in almost all of the northern hemisphere, meaning it never sets. It's apparent magnitude is 1.98, meaning it's visible from the night sky, even in light-polluted areas.