The student is given a list of right ascension and declination values, and is asked to determine which set would be closest to a given location on the celestial sphere (the celestial poles, equinoxes, celestial equator, or ecliptic).
keywords: right ascension, declination, celestial pole, celestial equator, equinox, ecliptic
swf file: ca_coordsmotion_radeclocs.swf