Which astronomer said that the earth was shaped like a ball with out edges?

All the planets revolves around the ____________.

The __________ is made up of extremely hot gases and produces its own heat and light.

__________ has both air and water which living being needs to live.

The line at which the earth and the sky seems to meet is called the ________.

One fourth of earth's surface is _________.

Which is the layer of air that surrounds the earth?

________ is the centre of the solar system.

How many years did it take to end the voyage of Magellan?

In early days,people thought that the shape of earth was ____________.