History Essay Example | Topics and Well Written Essays - 750 words - 48

History - Essay Example During this time, there were all sort of corrections that were made concerning to ensure that it is made to fit the motion of the planets to Ptolemy’s ideas. According to the Copernicus, he proposed an alternative theory that showed that the Earth was a planet moving around the sun and all planets were said to move in circular motion in form of a circle, one side to the other, he also made observations that Mercury and the Earth are close to the sun since they were smaller than the earth(Kidner, Bacur and Mathisen 502).Therefore out of discoveries that were made concerning the distance between earth and sun, it made ease estimations of distance of Mars, Jupiter and Saturn toward sun thus creating idea in mind that they had bigger circles than earth and seemed to move backward since they were said to move more slowly(Kidner, Bacur and Mathisen 502). In 16th century, Galileo an Italian mathematician and philosopher made the first observation, that is, he observed the planets through a telescope he built in 1609 and what he saw convinced him that Copernicus observations and discoveries toward the planets and dun was right. Galileo through hi aggressive defense over the Copernican theory was defended by the Catholic Church and therefore this cost him his freedom. Here are the discoveries that were made by the Galileo, he observed the moon and came to discover that it is like a world with mountains and â€Å"seas†(Kidner, Bacur and Mathisen 505). And later he observed the sun which was a risking act due to blindness since the sun should never be looked at through a telescope and he saw the sunspots. After making this discoveries, later he turned to the planet Jupiter, during this time he saw four moons orbiting around the Jupiter. Out of this discovery, he saw that the four moons are in the same plane, and close to their ecliptic and also seemed to be collinear(Kidner, Bacur