However, there are ways of proving the roundness of the Earth without traveling all around it. For example, look at the way a ship is seen approaching land. If the world was flat, such a ship wailing toward you would appear on the horizon ‘all of a piece’, from the banner of smoke above it to the line of the hull where it rests on the water. As the ship came nearer and nearer, it would simply seem to get larger. But this is not what happens. As a ship sails into view, you see first only the plume of smoke above it, then the top of the hull, then more of the hull, and finally the whole ship. This proves that the ship must be traveling up a great curved surface!
- What is the Earth made of? What is beneath the Earth?
- What is the weight of the planet Earth? Is it constant or increasing?
- Should we see the Earth go round if we stood still in a balloon in the sky?
- Why aren’t people at the equator thrown off into space by centrifugal force since the Earth is rotating at a high speed?