The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 6EAP
Summarize the development of the Greek geocentric model through Ptolemy. How did the Ptolemaic model account for apparent retrograde motion?
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What is an
epicycle? How is it important in Ptolemy's explanation of the retrograde
motions of the planets?.
The geocentric model, in all of its complexity, survived scientific scrutiny for almost 1,400 years. However, in modern
astronomy, scientists seek to explain the natural and physical world we live in as simply as possible. The complexity of
Ptolemy's model was an indicator that his theory was inherently flawed. Why, then, was the geocentric model the leading
theory for such a long time, even though the heliocentric model more simply explained the observed motions and
brightness of the planets?
Check all that apply.
☐ The geocentric model conformed to both the philosophical and religious doctrines of the time.
☐ The heliocentric model did not make noticeably better predictions than the geocentric model.
From Earth, all heavenly bodies appeared to circle around a stationary Earth.
The complexity of the geocentric model was appealing to most ancient astronomers.
Ancient astronomers did not observe stellar parallax, which would have provided evidence in favor of the heliocentric model.
What is retrograde motion? How did the geocentric theory explain these motions? How did the heliocentric theory explain these motions?
Chapter 3 Solutions
The Cosmic Perspective (9th Edition)
Ch. 3 - Prob. 1VSCCh. 3 - Use the following questions to check your...Ch. 3 - Use the following questions to check your...Ch. 3 - Use the following questions to check your...Ch. 3 - Use the following questions to check your...Ch. 3 - Prob. 6VSCCh. 3 - Prob. 7VSCCh. 3 - Prob. 1EAPCh. 3 - Why did ancient peoples study astronomy? Describe...Ch. 3 - Describe the astronomical origins of our day,...
Ch. 3 - What is a lunar calendar? How can it be kept...Ch. 3 - What do we mean by a model in science?Ch. 3 - Summarize the development of the Greek geocentric...Ch. 3 - What was the Copernican revolution, and how did it...Ch. 3 - 8. What is an ellipse? Define its foci, semimajor...Ch. 3 - 9. State and explain the meaning of each of...Ch. 3 - Describe the three hallmarks of science and how we...Ch. 3 - 11. What is the difference between a hypothesis...Ch. 3 - What is the basic idea behind astrology? Explain...Ch. 3 - Science or Nonscience? Each of the following...Ch. 3 - Science or Nonscience? Each of the following...Ch. 3 - Science or Nonscience?
Each of the following...Ch. 3 - Science or Nonscience?
Each of the following...Ch. 3 - Science or Nonscience?
Each of the following...Ch. 3 - Science or Nonscience? Each of the following...Ch. 3 - Science or Nonscience? Each of the following...Ch. 3 - Science or Nonscience?
Each of the following...Ch. 3 - Science or Nonscience?
Each of the following...Ch. 3 - Science or Nonscience? Each of the following...Ch. 3 - In the Greek geocentric model, the retrograde...Ch. 3 - Which of the following was not a major advantage...Ch. 3 - When we say that a planet has a highly eccentric...Ch. 3 - Earth is closer to the Sun in January than in...Ch. 3 - According to Kepler’s third law, (a) Mercury...Ch. 3 - Tycho Brahe’s contribution to astronomy included...Ch. 3 - Galileo’s contribution to astronomy included (a)...Ch. 3 - Which of the following is not true about...Ch. 3 - Which of the following is not true about a...Ch. 3 - When Einstein’s theory of gravity (general...Ch. 3 - What Makes It Science? Choose a single idea in the...Ch. 3 - Prob. 35EAPCh. 3 - Prob. 36EAPCh. 3 - Prob. 37EAPCh. 3 - Earth’s Shape. It took thousands of years for...Ch. 3 - Prob. 40EAPCh. 3 - Copernican Players. Using a bulleted-list format,...Ch. 3 - Prob. 44EAPCh. 3 - The Metonic Cycle. The length of our calendar year...Ch. 3 - Chinese Calendar. The traditional Chinese lunar...Ch. 3 - Method of Eratosthenes I. You are an astronomer on...Ch. 3 - Method of Eratosthenes II. You are an astronomer...Ch. 3 - Mars Orbit. Find the perihelion and aphelion...Ch. 3 - Eris Orbit. The dwarf planet Eris orbits the Sun...Ch. 3 - New Planet Orbit. A newly discovered planet orbits...Ch. 3 - Halley Orbit. Halley’s Comet orbits the Sun every...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Kepler's 1st law says that our Solar System's planets orbit in ellipses around the Sun where the closest distance to the Sun is called perihelion. Suppose I tell you that there is a planet with a perihelion distance of 2 AU and a semi-major axis of 1.5 AU. Does this make physical sense? Explain why or why not.arrow_forwardCopernicus's heliocentric model and Ptolemy's geocentric model were each developed to provide a description of the solar system. Both models had advantages that made each an acceptable explanation for motions in the solar system during their time. Sort each statement according to whether it is an advantage of the heliocentric model, the geocentric model, or both. Select the appropriate items to their respective bins. Heliocentric Rooted in widely accepted religious beliefs regarding Earth's place in the universe Explained planetary motions and brightness changes most simply Predicted planetary positions accurately over relatively short time periods Planetary orbits and motions based on Greek ideologies of perfect form and motion Geocentric Both geocentric and heliocentricarrow_forwardA newly discovered planet orbits a distant star with the same mass as the Sun at an average distance of 122 million kilometers. Its orbital eccentricity is 0.5. 1. Find the planet's orbital period. Express your answer in years to three significant figures. 2. Find the planet's nearest and farthest orbital distances from its star. Express your answers in millions of kilometers to three significant figures separated by a comma.arrow_forward
- In your own words, describe the meaning of Kepler's Third Law of Planetary Motion. Do not use any equations, do not describe the equations in words, just tell me the conceptual meaning.arrow_forwardExplain how did Kepler discovered his Laws of Planetary Motion.arrow_forwardState and explain the implications of each of Kepler's three laws of planetary motion.arrow_forward
- Ptolemy model of the solar system was by far the simplest and most elegant model. true or falsearrow_forwardIn Ptolemys model, which of the followingepicycle, equant, or deferenttravels in uniform circular motion as viewed from a particular point? Name and describe that point. Are these uniform circular motions at the same speeds and in the same directions?arrow_forwardUse the figure below to explain how the Ptolemaic model treated some planets differently from the rest. How did the Copernican model treat all of the planets the same?arrow_forward
- What two factors made it difficult, at first, for astronomers to choose between the Copernican heliocentric model and the Ptolemaic geocentric model?arrow_forwardWhat is P for Earth? What is a for Earth? Do these values support or disprove Keplers third law?arrow_forwardHow does Keplers first law of planetary motion overthrow one of the basic beliefs of classical astronomy? How about Keplers second law?arrow_forward
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