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south celestial pole

celestial equator

north celestial pole celestial meridian. , ^ zenith north point declination-

west point equatorial plane

Figure 2.5. (a) The horizon system and the hour-angle variant of the equatorial system superposed. The definition of the astronomical triangle for a risen star is illustrated. (b) The equatorial and horizon systems, but now seen from the western side of north celestial pole celestial meridian. , ^ zenith

Tfre Astronomical A

north point declination-

west point

Triangle

Star celestial equator I

equatorial plane south point south celestial pole south point

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