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polestar, the brightest star that appears nearest to either celestial pole at any particular time. Owing to the precession of the equinoxes, the position of each pole describes a small circle in the sky over a period of 25,772 years. Each of a succession of stars has thus passed near enough to the north celestial pole to serve as the polestar. At present the polestar is Polaris (α Ursae Minoris); Thuban (α Draconis) was closest to the North Pole about 2700 bce, and the bright star Vega (α ... Polaris, also known as the pole star is very close to the ‘North Celestial Pole ’ (NCP). This is the central point at which the stars visually rotate around in the sky. If you were stood on the North Pole , Polaris would stay directly overhead and hardly move. No-matter where your location is, the pole star hardly moves all night and the rest of the stars rotate around it. This star has a number of uses… Finding North – if you draw an imaginary line from the pole star down to the ... Polestar 5 An aluminium-bodied sports car taking performance dynamics to a new level. An aerodynamic Grand Tourer with the comfort and innovation to go the distance. The Earth-Sun system viewed edge on The south pole star So far, this post has focused on the Northern Hemisphere pole star . There is currently no bright star near the South Celestial Pole. The nearest star visible to the naked eye is the star Sigma Octantis in the constellation Octantis (named after the octant – the navigational instrument).
