Asteroids (as´ter-oids). The small planets that circulate between the orbits of Mars and Jupiter.
Ax´is (ax´is). The imaginary line passing through the center and poles of the earth, on which it performs its diurnal revolutions from west to east.
Azimuth (az´im-uth). An arc of the horizon intercepted between the meridian of the place and the vertical circle passing through the center of a celestial object.
Can´cer. The fourth sign of the zodiac, being that of the summer solstice, which the sun enters about the 21st of June.
Capricorn (kap´ri-korn). The tenth sign of the zodiac, which the sun enters about the 21st of December, at the winter solstice.
Colure (kol´ur). Two great circles, supposed to intersect each other at right angles in the poles of the world, one of them passing through the solstitial and the other through the equinoctial points of the ecliptic, viz., Cancer and Capricorn, Aries and Libra, dividing the ecliptic into four equal parts.
Coma (kō´ma). A dense, nebulous covering, which surround the nucleus or body of a comet.
Com´et. A member of the solar system, commonly consisting of three parts: the nucleus, the envelope or coma, and the tail; but one or more of these parts is frequently wanting.
Conjunc´tion. The meeting of two heavenly bodies in the same point or place in the heavens.