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← HistoryWhich measurement error develops upon prolonged astrolabe use?
A)Planetary orbital inclination drift
B)Star chart projection inaccuracies
C)Limb circle calibration offsets✓
D)Tympan plate cracking instability
💡 Explanation
Constant handling of the astrolabe causes gradually loosen parts and calibration offsets, especially around the limb, introducing parallax errors; this is mechanical creep because the brass weakens slightly over time, therefore measurements drift, rather than immediate failure.
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