The Heliocentric model meaning “Sun-centered” (Andronik 8) is the model we use today. Around 1510, Copernicus started work on the Heliocentric theory of the universe, another thing that he stated was that the Sun is the closest star to the Earth than any other star. Copernicus was dead before his system was proven correct. Galileo proved that the Heliocentric system was correct because he saw the movement of Venus with his telescope. Copernicus said that the Earth revolves around the Sun and the moon revolves around the Earth. The Science geek states that Copernicus brought up the theory that the cause of the Sun setting and rising is based on the tilt of the Earth's axis. Planetary motion was a huge part in his model to conclude that this model was correct. Planetary motion is the motion which the planets revolve around the Sun, and the Earth revolves around the Sun, it takes 365 days to revolve around the sun. Copernicus stated that all planets revolve around the Sun, the closest planet being mercury has the shortest time making a revolution because it is the closest to the Sun. Neptune, being the furthest, has the longest revolution time being the furthest planet away from the Sun (The Science Geek). He wrote all of his ideas in his books, it also stated that all the orbits are not a perfect circle, they are close but none of them are (Knight 18, 158, …show more content…
Without the Heliocentric model which is the Sun centered model, people would still think geocentric, which is the Earth is the center because people did not believe this model, which started to get popular after Copernicus died. Without his start up of this theory, Galileo would not have finally proved this, he proved this by observing Venus, he saw faces just like the moon. Why would people like us think differently about the universe we live in. Citizens would still think different because the Geocentric model was taken at the time the way the universe is, and if Copernicus did not have his theories, people today would still believe that life revolves around us. It was hard for people to fully understand and take in what it was actually like. Scientist would not have even come up with the idea and even today if we did not have the technology, people would still think