Polaris is the brightest star in the constellation Ursa Minor. It is very close to the north celestial pole, making it the current northern pole star. These are some amazing photographs I came across, and it's genius. Since the North Star is the central mark point of the Earth's northern tip, it stays constant to eye-view, while the Earth rotates; but all the stars around it move.
These photographs are taken with at least one hour to 9 hours' worth of exposure, thereby capturing start trails. The shorter the exposure, the smaller the trails, the longer the exposure, the longer the trails.
Picture by Joshua Bury
Picture by ohad*, Yosemite Valley
Picture by velvet_pow, over Mt. Fuji
Picture by ngc4594, in S. Korea