Place

The point on the celestial sphere to which a heavenly body is referred by the observer.

Apparent Place. The point to which a body is referred by an observer on the earth's surface, viewing it through the earth's atmosphere.

Geocentric Place. The point to which a body would be referred were the observer at the earth's centre.

Heliocentric Place. The point to which a body would be referred were the observer at the sun's centre.

True Place. The point to which a body would be referred were the observer at the earth's centre viewing it through an atmosphere of uniform density.