The Earth-centered system (The Ptolemaic Chart)
Many astronomer worked hard to make discoveries about the universe. However, they would not have been as successful without the Ptolemaic chart. Ptolemy’s system is what helped the process come along. With an explanation of the Ptolemaic chart and its impact on the world, Ptolemy was considered a genius.
About Ptolemy
Claudius Ptolemy was born around the year 100, in Alexandria, Egypt. Later, he wrote a textbook on mathematical astronomy, called “The Almagest”, inspired by Hipparchus. This book was the only documentation of Ptolemy’s life and accomplishments. “Procheiroir kanones”, the numerical tables in “The Almagest”, were used to predict the position of planets and celestial objects. Claudius also explored diverse topics, including the mathematical theory of trigonometry, musical theory, the studies of visual perception and cartography. His mathematical work showed the earliest remaining table of chords, which was an important theorem in trigonometry. Ptolemy created a world map by calculating the longitude and latitude of around 8 000
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It has taught the next astronomers about the movement of the celestial objects and how to make accurate predictions on their positions. For example, the Islamic astronomers welcomed the Ptolemaic chart into their work. Nicolaus Copernicus (1473-1543) switched the positions of the Earth and the Sun and then created the heliocentric model. In this system, the speed and motions of celestial bodies were modified. In the next few years, Johannes Kepler (1571-1630), took inspiration from the heliocentric model to formulate Kepler’s laws of planetary motion. In 1577, Tycho Brahe detected a comet that passed through Ptolemy’s supposed invisible spheres. Because of this, Brahe had to eliminate the theory of these solid orbs. With many adjustments over the years, the Ptolemaic chart was abandoned and became