41. The circumpolar stars appear to lie within a circle that is centered at the celestial pole and tangential to the horizon. 42. But because of its location, close to the north celestial pole , it's one of the most important stars in the sky. 43. Despite their faintness, Benjamin Gould upheld their Bayer designation as they were closer than 25 degrees to the south celestial pole . 44. Polaris is approximately three quarters of a degree from the North Celestial Pole and is easily seen by the naked eye. 45. In the next 7500 years, the south Celestial pole will pass close to this stars and Omega Carinae ( 5800 CE ). 46. Some types of sundials are designed with a fixed gnomon that is not aligned with the celestial poles like a vertical obelisk. 47. Similarly, a line from the center to the South celestial pole will define the South point by its intersection with the limb. 48. In the next 7500 years, the south Celestial pole will pass close to this stars and Iota Carinae ( 8100 CE ). 49. In the next 7500 years, the south Celestial pole will pass close to this stars and I Carinae ( 5800 CE ). 50. The identity of the pole stars gradually changes over time because the celestial poles exhibit a slow continuous drift through the star field.
