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Quadrant

Used to measure altitudes or zenith locations of celestial bodies.

Theodolite

Used to measure altitude and azimuth coordinatess of celestial bodies.

Azimuth Theodolite

Used to measure the azimuth coordinates of celestial bodies.

Sextant

Used to measure the angular distance between celestial bodies and to measure the angular diameter of the sun and moon.

Celestial Globe

Used to determine the rising and setting times of celestial bodies as well as determining the altitude and azimuth of celestial bodies at any time.

Editor: Dong Jirong