|
cardinal points: the main directions on the mariner's compass, north, south, east and west.
|
carpenter's rule: measuring ruler carrying one or more scales for calculating the volume of timber or the surface area of board or planking.
|
celestial globe: globe marked with the positions of the stars.
|
celestial planisphere: map of the heavens, produced by geometrical projection of a sphere on to a flat surface. A common example of the use of a form of planisphere is the rete of an astrolabe.
|
celestial poles: diametrically opposite points of the celestial sphere about which the heavens are observed to rotate once a day.
|