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← HistoryWhich inaccuracy increased in early astrolabes that impacted timekeeping?
A)Eccentricity with Sun's apparent motion✓
B)Thermal expansion in the alidade vane
C)Parallax affecting star altitude readings
D)Magnetic declination affecting compass alignment
💡 Explanation
An astrolabe's accuracy depended on modeling the sun and stars accurately; eccentricity with the RETROGRADE MOTION required epicycles; an effect that was hard to model accurately, because early models were geocentric; therefore timekeeping was imprecise, rather than expansion or magnetic declination being primary effects.
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