Which adjustment compensates for seasonal star chart variations when using astrolabes at differing latitudes?

💡 Explanation

When astrolabes are used at different latitudes, the angles representing the celestial sphere change, and the tympanum, specific to a latitude, must be swapped because it represents the local horizon and altitude lines. Therefore modifying the tympanum plate is required, rather than alidade, rete, or fiducial markers which address other aspects like time/date and individual star positions.

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