Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 22
itudeand SX. the azimuth measured positively in the westerlydirection. ^F is the declination, AP the north polar distance and LY THE CELESTIAL SPHERE 9 the hour-angle measured positively in the westerly direction.T F is the right ascension of A, measured positively from T toY. Ti is the sidereal… … 2/ Fig. 3.—To illustrate the Eelationship between Altitude and Azimuth andEight Ascension and Declination. LWM, Equator SWN, Horizon AP, North Polar Distance AZ, Zenith Distance AY, Declination AX, Altitude LY, Westerly Hour Angle SX, AzimuthT F, night Ascension. two co-ordinates by applying the…
Astronomy
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