Big thanks to the geocentric discussion which explained that the Earth is the center of all and made the understanding easier to comprehend. Due to this, it paved the way for Tycho Brahe to learn about the celestial bodies. He was a leader but because of the fact that he wasn't supported and obeyed by his followers, he went to other place, the Prage, and met someone who helped him. Then, he became the Imperial Mathematician which was the continuous point for his amazing calculations and observation about the solar system. Time flies by and Brahe had an appointed assistant who is Johannes Kepler. He didn't trust Kepler that much about his belongings but when he died, Kepler was able to took Brahe's possessions. This made Kepler the reigning Imperial Mathematician and he started analyzing about planetary motion. As we all know and have heard about, there are three laws about planetary motion; 1.) The Law of Ellipses - planets act in accordance to an elliptical orbit, 2.) The Law of Equal Areas - planets that move in an orbital way have the equal time interval to the area that was swept out by the planet, and lastly, 3.) The Law of Harmonies - shows harmonic relation between distances and periods.

Until in our times, these laws are still making an influence to the field of astronomy. Maybe some astronomers are still finding an answer to their educated questions about the solar system which we obviously haven't know about yet.

It's exciting to know that there is still more ~ :)

Since a thousand years ago, scientists have struggled to understand what they see in the night sky throughout history. Famous astronomers during that time were able to explain the nature of the heavens. As time passed by, the geocentric view of the universe paved the way to the proper view of the universe, wherein it tells us that the earth is the center of everything. These theories and discoveries gave us a better understanding of the expanding universe in which our galaxy is just one of billions.

In the fourteen centuries since Ptolemy, there are prominent scientists that made significant discoveries which gave birth to modern astronomy. These are: (1) Tycho Brahe. He was a Danish astronomer and nobleman who made precise observations of celestial body movements in an observatory built for him by King Frederick II of Denmark in 1576. With the help and support of his assistants, he was able to invent various astronomical instruments and conduct extensive research on the solar system. Time passed, when King Frederick II died and his successor did not fully support Brahe's work, so he moved to Prague in 1599 and worked as an imperial mathematician under Emperor Rudolf II. He suggested Johannes Kepler to work for him as an assistant. (2) Johannes Kepler was born into a poor German family and attended the University of Tübingen as a scholar in 1589.

During that time, Brahe and Kepler's working relationship was quite rocky. Brahe's assistant was Kepler. In order to avoid being shadowed by his assistant, Brahe did not trust Kepler with his astronomical data. But after Brahe died in 1601, Emperor Rudolf II appointed Kepler as the new imperial mathematician, and he received all of Brahe's writings, instruments, and the Rudolphine tables. From Brahe's astronomical data, Kepler was able to formulate his laws of planetary motion. The (1) First Law: The Law of Ellipses, which describes the planets' actual paths as elliptical rather than circular, with the Sun at one of the ellipse's foci. (2) Second Law: The Law of Equal Areas, states that an imaginary line drawn from the center of the Sun to the center of a planet will sweep out an equal area of space in equal time intervals. And lastly, (3) Third Law: The Law of Harmonies, which states that the ratio of the squares of two planets' periods is equal to the ratio of the cubes of their average distances from the Sun.

With all that being said, and all things considered, Brahe's and Kepler's contributions to the knowledge of the universe are indeed a crucial part in a better understanding of the heavens, the galaxies, and the things that are into it. Because of their curiosity and thirst for unending knowledge, they were able to formulate theories and laws that are still beneficial today. Their discoveries and data have played a significant role in our current scientific knowledge. As it gives us much expanded knowledge, and comprehension of the mystery that the universe is still hiding. 

Furthermore, I also learned something about Tycho Brahe and Johannes Kepler. Tycho Brahe was the first person to use a telescope to conduct extensive astronomical observations. He discovered that the planets have elliptical orbits around the Sun. He proposed some simple laws that govern the motion of planets and other celestial bodies.
 Tycho Brahe proposed a theory of the solar system, which contained elements of both the Earth-centred Ptolemaic system and the Sun-centred Copernican system. In his theory, the other planets revolved around the Sun, which itself revolved around Earth. On the other side, Johannes Kepler discovered that the Earth and planets travel about the sun in elliptical orbits. He gave three fundamental laws of planetary motion. These laws are : LAW OF ELLIPSES, LAW OF EQUAL AREAS, and LAW OF HARMONIES.

The Law of Ellipses
Kepler's first law - it explains that planets are orbiting the sun in a path described as an ellipse. His first law is rather simple, all planets orbit the sun in a path that resembles an ellipse, with the sun being located at one of the foci of that ellipse.

The Law of Equal Areas
Kepler's second law - it describes the speed at which any given planet will move while orbiting the sun. The speed at which any planet moves through space is constantly changing. A planet moves fastest when it is closest to the sun and slowest when it is furthest from the sun.

The Law of Harmonies
Kepler's third law - it compares the orbital period and radius of orbit of a planet to those of other planets. Unlike Kepler's first and second laws that describe the motion characteristics of a single planet, the third law makes a comparison between the motion characteristics of different planets.