Diagram showing GP distance = ZD.jpg
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Diagram showing GP distance = ZD, Diagram showing that the zenith distance of a celestial body is equal to the angular distance of the geographical position of the body from the observer.
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Diagram showing GP distance = ZD, Celestial navigation
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ja
GP距離=ZD、天体の頂点距離が観測者からの距離の角度と等しいことを示す図。
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ja
GP距離=ZD、天測航法を示す図
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celestial guidance celestial navigation angular celestial body euclidian long-distance running