The declination of a celestial body is its angular distance N or S of the celestial equator or equinoctial.
The angle of elevation of the celestial equator to the horizon varies according to the position of the observer.
The celestial equator is the great circle in which the plane of the earth's equator intersects the celestial sphere.
The line of intersection will be a great circle of the celestial sphere, called the celestial equator.
Then the zenith would be on the celestial equator and the north and south poles of the heavens would be on the horizon.
The celestial equator is a great circle of the sky distant 90 from the poles.
The ecliptic intersects the celestial equator at two opposite points, the equinoxes, at an angle of 23 27′.
The covering of this Ferguson globe is made to open on the line of the celestial equator.
The stars which are preferred for observation are called time stars and are selected as near the celestial equator as possible.
Equinoctial, in astronomy, the circle in the heavens otherwise known as the celestial equator.
|celestial equator |
A great circle separating the northern and southern hemispheres of the celestial sphere and lying in the same plane as the Earth's equator. The celestial equator is a projection of the Earth's equator outward onto the celestial sphere and is used as the reference point in determining a celestial body's declination.