Astronomy Informative Speech

Ptolemy, a Roman astronomer came up with the theory that the universe revolved around Earth and all the creatures inhabiting it (Doc. C). This theory, The Geocentric Universe of Ptolemy, was adjusted by most of the people during The Middle Ages. However, much later on, Nicolaus Copernicus, a Polish astronomer, disagreed with Ptolemy’s theory. With his use of math and reason, he came up with a new theory called The Heliocentric Universe of Copernicus (Doc. C). He said that the universe & Earth itself revolves around the sun. The Church denied this theory because they did not want to be proven wrong. If the Church was wrong about this part of the universe, this would then cause man to wonder what else they could be wrong about, or even lied to them about. This new theory taught men to think for themselves and not to rely on the Church for

In concordance with Christian doctrines, this system implies that heaven and the throne of God lie beyond the tenth sphere. On the other hand, during the first half of the 16th century, Polish cleric Copernicus developed an astronomical model which positions the motionless Sun at the center of the universe, with the Earth, the moon, and six other planets revolving at a constant speed around it. He argues that all stars were at rest and that their nightly movements are simply indications of the earth’s rotation. However, members of the Church, especially Protestants, who interpreted the Bible literally, refused to grant Copernicus credit for his theory. Nevertheless, once released among the population, the Copernican theory raised support from various scholars, a few of whom, such as Brahe, Kepler, and Galileo, went on to dedicate their career to solidify its legitimacy. With their use of mathematical reasoning, instead of antic philosophy, the Copernican theory finally became justified among the population. Pertaining to its influence among laypeople, the Copernican theory raised various questions against the

The Scientific Revolution changed society with the birth of “modern science”; it changed the way people thought about the physical world around them. The same spirit of inquiry that fueled the Renaissance, led scientists to question traditional beliefs about the workings of the universe. The conflict all began with Copernicus’ heliocentric model being introduced to the world- going against the Church’s traditional teachings. Nicolaus Copernicus developed the heliocentric model of the universe- stating that the sun is the center, and that other planets revolve around it. Despite his calculations, people disagreed and kept on believing in Ptolemy’s geocentric model.

Copernicus published "On the Revolutions of the Celestial Spheres" in 1543 , sparking off the scientific revolution and a new era of astronomical thought. This theory explains that the sun, not the Earth, is the center of the solar system and planets move in a circular motion around it. This had many social, intellectual and religious made of huis idea. For instance, this theory brought into question the strict reading of the Bible and philosophies of the Catholic Church.

From the time of Aristotle up until the time of Newton there were five models of what humans thought of the universe. The astronomers who developed these models were Aristotle, Ptolemy, Copernicus, Tycho Brahe, Kepler, Galileo and Newton.

1) Modern astronomy basically begins with the re-emergence of the heliocentric view of the universe by Copernicus.   Who were the four other major contributors to the development of modern astronomy after Copernicus?  Explain what those contributions were.  Finally, why did it take so long for the geocentric view of the universe to be overthrown and what does that tell us about scientific research and our society, even today?

In “Towards a New Heaven: Revolution in Astronomy,” some of the greatest achievements of the Scientific Revolution of the sixteenth and seventeenth century were dominated by medicine, mechanics, and astronomers. Nicolaus Copernicus, Johannes Kepler, Galileo Galilei, and Isaac Newton were some of the brilliant individuals that magnified the revolutionary astronomy. These astronomers challenged the conception and beliefs through the nature of the external world.

When it comes to theories and law’s concerning the movement of stellar bodies and why the universe is moving the way it is and how it came to be, data is continuously being added and revised. It is through this constant revising of theories and establishing of laws that core ideas are proven, with modern day scientists expanding knowledge for the rest of us. One of the earliest pioneers of spatial theories was the Italian astronomer, Galileo Galilei, who used the theories of those who came before and he learned from to paint a better picture of the way the universe was set. True to form, he dealt with accusations of heresy and resistance to his ideas from others during his life, which today are held as being before his time.

The first theory of the placement of the planets and stars to disprove the theocentric theory, God centered, was the geocentric theory. This idea began with the philosopher Aristotle in fourth century B.C. Greece, and was expanded and better explained in second century A.D. by Greek Astronomer Ptolemy. The main point of this theory was that the Earth was the center of the universe. This was “proven” by the observation of the sun moving around the earth every day, as seen in the

Galileo Galilei was also a supporter of the Copernican Theory. Galileo believed the earth, and other planets, rotated on its axis around the unmoving sun. He used his new invention of the telescope to prove Copernicus’ theory. With the telescope, Galileo found sunspots on the earth’s moon, which gave proof to him that the heavens were not perfect and changeless but were more like the changeable earth. iv He also discovered Jupiter and the four moons that revolved around it. He only discovered one moon revolving around the earth. Galileo therefore stated if Jupiter were to revolve around the earth, then the earth would have to have at least four moons, and it doesn’t. v The Church objected Galileo’s theory because the Bible said the sun moved through the sky. Being totally rejected by the church, Galileo was forced to take back what he had written and was also prevented from any further teachings of his theory. Galileo was condemned by the Catholic Church for his ideas. The Church succeeded in silencing Galileo but couldn’t stop the advancements in science.

Everybody has heard of the name Vincent Van Gogh. Maybe you’ve heard about his ear or you’ve seen his painting “The Starry Night”. Perhaps you had seen one of his paintings but didn’t know who he was. I am happy to tell you: today is your lucky day. You will be learning a little about him. He was a Dutch painter which was one of the 4 artists who led the movement Post-Impressionism (the use vivid colors, thick application of paint, and real-life subject matter), Van Gogh made about 2,100 artworks, including around 860 paintings. He didn’t have a good life. Van Gogh was constantly depressed, got heartbroken multiple times in his life (he never got married), and was insane. He suffered from psychotic episodes and hallucinations. Often, he didn’t care and neglected he was mentally unstable. For this reason, he did not eat properly and drank a lot.

The geocentric view of the universe, first introduced to the world in about 150 CE, was thought to be the undoubted correct model of what the universe looked like. The theory described the Earth as the center of the universe, with stars and planets orbiting around it. According to Carl Sagan, an American astronomer and cosmologist, “This [the geocentric view] is the most natural

The use of the telescope led him to discover new characteristics of space and the solar system. He discovered Jupiter’s four largest moons and the rings of Saturn. He also discovered that the Milky Way galaxy is comprised of stars. The observation of mountains on the moon was made by Galileo as well. He also made numerous discoveries within these discoveries.

In summer of 1609, Galileo Galilei (1564-1642) pointed his revolutionary astronomical telescope to the heavens under the starry Venetian sky; his greatly important observations unveiled the mysteries of universe and would end up changing the course of scientific thought forever. Galileo lived in an age where there was much status quo, when scientists and philosophers would accept scientific and religious doctrine that had stood for hundreds, if not thousands, of years instead of challenging the accepted knowledge in favor of intellectual progress. Galileo’s scientific methods lead to significant discoveries explaining key scientific laws, such as the

Johannes Kepler was a German astronomer and mathematician who lived between 1671-1630. Kepler was a Copernican and initially believed that planets should follow perfectly circular orbits (“Johan Kepler” 1). During this time period, Ptolemy’s geocentric theory of the solar system was accepted. Ptolemy’s theory stated that Earth is at the center of the universe and stationary; closest to Earth is the Moon, and beyond it, expanding towards the outside, are Mercury, Venus, and the Sun in a straight line, followed by Mars, Jupiter, Saturn, and the “fixed stars”. The Ptolemaic system explained the numerous observed motions of the planets as having small spherical orbits called epicycles (“Astronomy” 2). Kepler is best known for introducing three