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At that time everyone believed that the earth was    at the centre of the universe. But Copernicus realised that this picture did not agree with astronomical observations. He found out that the Sun was at the centre with all the planets moving around it. He said that our earth takes a year to travel around the Sun. It revolves once every 24 hours. Copernicus believed that the planets moved around the Sun in perfect circles. Fifty years later, Kepler used the extremely accurate measurements of Tycho Brahe to show that they do not.

The belief that the earth was at the centre of the universe was held at that time by:

A)  Everybody

B)  Copernicus

C)  The uneducated persons         

D)  Tycho brahe

E)  None of these