en: In early astronomy , his fame is due to the introduction of the mathematical globe and to his astronomical contributions to understanding the movement of the planets . In early astronomy , his fame is due to the introduction of the mathematical globe , and his astronomical contributions to understanding the movement of the planets .
ms: Pada awal astronomi, kemasyhurannya adalah disebabkan pengenalan dunia matematik dan sumbangan astronominya untuk memahami pergerakan planet. Pada awal astronomi, kemasyhurannya disebabkan oleh pengenalan dunia matematik, dan sumbangan astronominya untuk memahami pergerakan planet.