File:Position Angle - Spherical Triangle for Derivation.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:34, 16 September 2011 | 730 × 900 (18 KB) | Sch | {{Information |Description ={{en|1=Diagram showing the spherical triangle used for deriving the formula for the astronomical position angle of point 1 with respect to point 2. The corners of the triangle are the north celestial pole N, point 1 (with ce |
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