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“Aryabhatiya I.5 (Dasagitika, 499 CE) gives Earth's diameter as 1,050 yojanas. The yojana is an Indian unit of distance whose conversion to modern units is disputed in Sanskrit-scholarship (estimates 5-8 miles, depending on text and period). With the most-cited mid-period value of ~7.5 miles per yojana, 1,050 yojanas = 7,875 miles — within 0.5% of the modern measurement of 7,917 miles. The Sun, Moon, and planet diameters in the same verse (in ratios to Earth's) are similarly close. ”