Perhaps it was then, at the coast of Ireland, at the ripe Columbus plan: using the sphericity of the Earth, to sail west to reach the East - India. I must say that the Indies were then called India, Burma, China, Japan, the Moluccas, Indonesia, and even Ethiopia. Columbus himself, speaking of the Indies, had in mind primarily the mysterious island Sipango (ie Japan), which for the first time mentioned the Marco Polo. The idea of ??the sphericity of the earth in general ceased to be heretical. But left open the question of the size of the globe. Divide the circle into 360 degrees was inherited from the Greeks is still, however, no one knew how great he degree.