Copernicus and the trial of Galileo

There is two theories of the solar system. One is called the "Heliocentric" and the other called geocentric. The heliocentric one states that the earth and the planets revolve around the sun. And that the sun is stationery and at the center of the universe. And this is the theory many believe, because everything on earth would not be the same, if the earth was in the center and the sun revolved around it. The theory was against another one called "Geocentric".

The Geocentric theory stated that the Earth was in the center of the solar system and that other planets (including the moon & sun) revolved around Earth. This theory was opposed by another called "Heliocentric". Belief in this system came from mostly ancient Greece, similar ideas were made in China. This theory was proved wrong and now is not being used at all.

The Galileo's trial was about two different science beliefs. The Catholic Church put Galileo on trial because he had his own theory and that collided with another theory that was powered by Catholics. Galileo believe that the sun, stars and planets revolved around Earth. But Catholics believe that the Earth revolved around the sun, start etc. Soon the theory that was made by the Catholics were proved true, and currently is being used in science.