The point on the celestial sphere directly above either of the earth’s geographic poles, around which the stars and planets appear to rotate during the course of the night.
- This is the phenomenon of precession, caused by the Earth's axis slowly rotating around the celestial poles.
- At first thought this does not seem too difficult a problem, even without a bright star close to the north celestial pole during the millennia of interest.
- The method proposed by Spence involved two stars on opposite sides of the celestial pole.
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Line breaks: ce¦les|tial pole
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