Earth Science Section 27.2 Homework: Models of the Solar System: Due Tuesday, 2/7/12
Read Section 27.2, pages 691-694. Answer the questions that follow.
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Last Name, First Name *
Period (Do not put nd, rd, or th after the number!) *
How is Ptolemy's model of epicycles and Copernicus's model of the Solar System different? See page 691 and analyze the diagram. *
Who proposed the idea of epicycles in a geocentric system? *
Planets sweep out equal areas in equal times. This is a statement of *
Mars is 1.5 astronomical units from the Sun, Earth is 1 astronomical unit from the Sun, Jupiter is 5.2 astronomical units from the Sun, and Saturn is 9 astronomical units from the Sun.1 astronomical unit is the average distance from the Earth to the Sun, which is 93 million miles. Which planet will take the longest amount of time to go around the Sun according to Kepler's 3rd Law? *
Why is an Astronomical Unit (AU) an easier unit to use when measuring distances in the solar system? *
What law describes the reason that planets continue to travel around the Sun without any apparent propulsion? *
What is the force that Newton described that keeps planets from flying away from the Sun and keeps them going around the Sun in a curved orbit? Name and Describe it. *
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