The point where the Earth's axis of daily rotation strikes the celestial sphere The sky appears to rotate about this point Polaris, the North Star is close to the North Celestial Pole
Either of the two points of intersection of the celestial sphere and the extended axis of the earth, labeled N or S to indicate whether the north celestial pole or the south celestial pole
These are simply the projections of the Earth's poles, onto the celestial sphere The declinations of the North and South celestial poles are 90°N and 90°S respectively The star Polaris is very close to the North celestial pole The poles provide an easy way of measuring latitude Simply, the angle between the pole and the horizon, in degrees, is the equivalent to your latitude See also celestial equator
The sky can be imagined as a sphere surrounding Earth As Earth rotates the sky appears to move Standing at the north pole, the point directly above in the sky would be the North Celestial Pole, and all the stars would appear to revolve about this point On the opposite side of the sky is the South Celestial Pole By aiming an equatorially-mounted telescope's mount toward the celestial pole it can keep up with the rotation of Earth using a simple clock drive
Either of the two points in the sky directly above the North and South poles These points remain stationary as the rest of the sky appears to revolve around them as the Earth turns on it's axis See also: celestial equator, ecliptic, meridian