Aristotle divided the Universe into two spheres: one above the Moon and the second under it. This enabled him to explain why there is no problem to move objects on the ground and in the air whereas the stars are stable.
Aristotle's theory was that heavier objects fall faster than lighter objects, but he was wrong.
Eratosthenes
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I don't really know that is why I went to this website that's my answer
Johann Bayer was the first astronomer who named the stars assigned to constellations and gave them Greek letters. He began this system in 1603.
Claudius Ptolemy and Nicolaus Copernicus both described the universe. Ptolemy, a Greek astronomer, wrote a book that combined all knowledge of astronomy that he could find. He expanded ancient theories with careful mathematical calculations in what was called the Ptolemaic Theory. Ptolemy thought the Earth was the center of the Universe and that the sun and other planets revolved around Earth. Although this theory was incorrect as we now know, it predicted motions of the planets better than any other theory at the time did. Copernicus, a Polish astronomer, published a new theory that would eventually revolutionize astronomy. Copernicus thought the Sun was the center of the universe, and all the planets (including Earth) orbit the sun. Although Copernicus correctly thought that the planets orbit the sun, his theory did not replace Ptolemaic theory immediately. When Copernicus's theory was accepted, major changes in science and society called the Copernican revolution took place.
Aristotle believed in the importance of logic and reason in understanding the world. He also emphasized the concept of the "golden mean," or finding the right balance between extremes. Additionally, Aristotle's ideas on ethics and politics have had a lasting influence on Western thought.
Aristotle believed that revolutions occur when there is an imbalance of power and wealth in a society, leading to a struggle between the rich and the poor. He argued that a moderate and just political system is less likely to be overthrown through revolution, as it promotes stability and prevents extreme inequalities. Additionally, Aristotle suggested that revolutions can sometimes be necessary to correct injustices and restore balance in a society.
The Greek astronomer Ptolemy (Claudius Ptolemaeus 100-170 AD) based his geocentric theory on the work by Aristotle (384-322 BC) and Aristotle's student Plato.
AnaximanderThe Greek natural philosopher and astronomer Anaximander (ca. 610-ca. 546 B.C.) attempted to explain the origins of the universe through his theory of the apeiron.Anaximander was a pre-Socratic Greek philosopher from Miletus. He belonged to the Milesian School and learned from his master Thales.
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Greek astronomer Ptolemy
Hipparchus, who was a Greek astronomer
Aristotles theory stated that all substances were built from 4 elements, earth, air, fire, and water
There was more than one astronomer who agreed with the heliocentric theory and was imprisoned for his investigations. The astronomers were Copernicus, John Dalton, Lamarck, and Galileo.
The person who studies stars is called an astronomer.
Aristarchus.