Polaris

Polaris, the North Star, sits almost directly above Earth's North Pole. As Earth rotates, the stars and constellations in the night sky appear to rotate around Polaris. The farther a star or constellation is from Polaris, the larger the circle it travels. Only Polaris remains still, always pointing North. 

Polaris is actually a triple star system, with a yellow supergiant star at the centre 1260 times brighter than the Sun. It is so far away that its light takes 400 years to reach Earth.

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