ARYABHATA-I ARYABHATEEYA (499 AD)
Kaashtamayam samavruthham samanthatha:
samagurum laghum golam paaradathaila jalaistham
bhramayeth svadhiyaa cha kaalasamam
Made of wood, fully circular, uniform, equally dense throughout and spherical shaped golayantra,
which rotates at a fixed rate of time as the earth does by the help of mercury,
oil and water, by the application of our intelligent calculation, is the golayantra-Globe.
Nrushiyojanam, njilaa bhoovyaaso
8000 Nr units is equal to one yojana. The diameter of earth is 1050 yojana.