Which innovation from Islamic astronomy most impacted the precision of observatories by the 10th century?

💡 Explanation

Large mural quadrants improved observational accuracy because their size reduced parallax errors and increased angular resolution, leading to more precise measurements of celestial objects. Therefore, advancements in their development led to greater observatory precision, rather than sundials, heliocentric models, or Ptolemaic refinements, which addressed different aspects of astronomy.

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