This circle divides the sky into its northern and southern portions. The point where the Earth's axis of daily rotation strikes the celestial sphere. An imaginary sphere against which we see the stars and on which we measure their positions. Conjunction Two objects are said to be in conjunction when they arrive at the same longitude on the ecliptic. See Inferior Conjunction and Superior Conjunction.
Most groups have no physical significance.
The celestial equivalent of latitude . It is measured in degrees, and its symbol is the Greek letter, delta. The path of the sun as seen against the stars. The band of sky in which eclipses can occur. It is also the path of the planets and is tilted 23 degrees from the equator of the Earth.