Celestial geography | Celestial compass| Celestial ecliptic | Celestial precession | Celestial sphere Precession of the Equinoxes This is a phenomenon that happens to Earth. It is like the behaviour of a spinning top. This results in Earth's axis pointing at slightly different directions over time. The North Star, Polaris in the constellation Ursa Major, would no longer be the polar star in 26 000 years, when Vega, the brightest star in the constellation Lyra becomes the star closest to the North Pole. Celestial geography | Celestial compass| Celestial ecliptic | Celestial precession | Celestial sphere
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