These images attempt to show three dimensions, so each sphere represents "volume." They show that in comparison to the volume of the globe, the amount of water on the planet is very small.

However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used special globes and instruments to make measurements and teach.

Detailed price information for Sphere Entertainment CO (SPHR-N) from The Globe and Mail including charting and trades.

Detailed price information for Sphere Entertainment CO (SPHR-N) from The Globe and Mail including charting and trades.

Satellite image of the Earth with the Atlantic Ocean in the centre. From space, the Earth looks like a sphere or a ball. About two thirds of the surface is covered with water, and the rest is ...