In the past, the Geocentric and Heliocentric model were the major model that human represent the fundament of the Planetary System. The planetary system is when the planets are caught by the gravity of a star, and then forced to revolve around that star. This situation becomes a Planetary System.
The Geocentric Model is the idea of the Earth is in the middle of the universe and other stars are orbiting around it. Meanwhile, the planets are moving in a small circle on the way of an orbit. It is a very popular idea and believed by many early ancient civilizations. Aristotle and Ptolemy were two of many famous astronomers that made and supported this idea. The Catholic Church also was in support of this idea. They believed that God created the Earth, therefore it should in the middle of universe. The Heliocentric Model is the idea that the sun should be in the center of the universe. The Earth and the other planets should orbit around it. This idea was first proposed by the Nicolaus Copernicus, a mathematician and astronomer in the age of Renaissance. He was working for the Catholic Church, but his idea of Heliocentric model lacked evidence. Therefore, three other people helped to find the evidence and proved his idea. These scientists and mathematicians were Galileo Galilei, Johannes Kepler and Sir Isaac Newton. The was one of basic evidence of both Geocentric and Heliocentric models was the Apparent Daily motion. The apparent daily motion is when the humans on the Earth view the motion of the star moving. When we see the motion of the star moving in top of the sky, we will discover that in different time and different location we will see the different star. This is a type of the parallax. Parallax is mean the difference of the thing we see in different situation. Which it use to prove the Heliocentric model was more accurate. The major difference of these idea were the way of planet orbit and who was orbit around whom? The orbit is the way of one object moving around the other object. Science can explain this as a planet or moon being caught by the gravity of the star or moon, this forces them to move around them. This is known as revolution, their path of revolution is called an orbit. The idea of Geocentrism and Nicolaus Copernicus all believed that the orbits around the sun were a perfect circle. But Johannes Kepler believed it should be a oval shape (Elliptical). And the orbiting speed of the planet or moon is different depending on the distance from them to the star or planet because the amount of the gravity them would get from star. This is known as the Kepler's law of planetary motion and the Newton's law of universal gravitation. The Gravity is the force celestial bodies have on them, it can catch the other celestial bodies to orbit it. It also can affect the things within other celestial bodies, such the gravity of moon causes the tides of the Earth.
1. The Earth motion will let us know different things of the universe, and will affect our life. The way of it affect our daily life, the rotation of the Earth gave us day and night. The revolution and title of the Earth gave us the different reason.
2. The Sun, Earth, and Moon were also interact each other, the way of them interact each other were their gravity cause the Earth's tide, and Earth orbit around the sun, and moon orbit around the Earth.
