Which astronomical calculation was improved by the geared mechanism in medieval Islamic astrolabes?

💡 Explanation

When medieval Islamic astronomers used geared astrolabes, epicyclic gear trains allowed calculations of planetary positions, specifically allowing them to incorporate the equant offset more accurately because it allowed them to represent non-uniform circular motion more mechanically. Therefore planetary equant determination improved, rather than declination, lunar orbit details, or stellar motion which require other systems and methods.

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