In his many studies he had noticed, “in the heavens many things that had not been seen before [in] our own age.” (Galileo) With observing the many physical changes in the heavens, he had strong evidence to prove that the belief of the earth being geocentric was wrong. He then revived the idea of the Copernican system with the universe being heliocentric. This caused a great debate between the church and science.
Galileo’s arguments created a separation from the church to the state. He wrote his letter to the Grand Duchess Christina of Tuscany in 1615. At this time, religion was taken very seriously and if you were against the church you were considered an outsider. With Galileo’s strong evidence against the church and stating that the sun is the