ASTRO 102 Extra Credit

Topics: Galileo Galilei, Jupiter, Moon Pages: 2 (464 words) Published: September 25, 2014
Galileo (Graded)
Describe the contributions of Galileo to astronomy and the Copernican revolution. Include in your response a list of observations made by Galileo of the Moon, the Sun, Venus, and the Moons of Jupiter. Be specific, describe what he saw, the conclusions he drew from these observations, and how these conclusions either supported or refuted the prevailing model of the Cosmos. Be sure to provide substantive responses to at least two of your classmates. A substantive response will address some specific point of the discussion with added relevant scientific content. Resource:  Use this search string in Google, " Galileo Copernican Revolution"  Omit the quotes. The telescope was used since at least 1590, but Galileo was one of the first to use it on the heavens. He found observational evidence against traditional views as to craters on moon, phases of Venus and moons of Jupiter, to name a few. His main impact is being an aggressive popularizer of Copernican viewpoint and satirist of Aristotelian physics. Again, we go back to Aristotle. His concepts of instantaneous motion led to the development of Calculus around 1665-1666. He saw the four largest moons of Jupiter in orbit around the planet, proving that the Ptolemaic system was not simple, that the solar system was not geocentric, meaning that the planets and the sun did not orbit around the Earth. He stated that there were sunspots on the surface of the sun, that the sunspots changed their shapes, and that both originated and dissolved on that sphere, concluding that the sun was not a perfect sphere, which was in direct contradiction to the views of the Church. Galileo saw that Venus display phases similar to our moon. According to the Ptolemaic system, Venus could only display a crescent phase because its epicycle always placed it between Earth and the sun, and the Copernican system put everything rotating around the sun, which explained the phases of Venus. At the time, most scientists...
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