Circumpolar stars, map of north, [201].
Colors of stars, [214].
Colures, the four principal meridians of the celestial sphere passing from the pole, one through each equinox, and one through each solstice.
Comets, [126]; Halley's, [128]; Biela's lost, [129]; Encke's, [130]; constitution of, [131]; will they strike the earth? [133].
Conjunction. Two or more bodies are in conjunction when they are in a straight line (disregarding inclination of orbit) with the sun. Planets nearer the sun than the earth are in inferior conjunction when they are between the earth and the sun; superior conjunction when they are beyond the sun.
Constellation, a group of stars supposed to represent some figure: circumpolar, [201]; equatorial, for December, [202]; for January, [203]; April, [204]; June, [205]; September, [206]; November, [207]; southern circumpolar, [208].
Culmination, the passage of a heavenly body across the meridian or south point of a place; it is the highest point reached in its path.
Cusp, the extremities of the crescent form of the moon or an interior planet.
Declination, the angular distance of a celestial body north or south from the celestial equator.
Degree, the 1/360 part of a circle.