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Here’s a video of Venus in the geocentric model of the universe: http://www.youtube.com/watch?v=OlnlbZHP-jk It plays fast. Play it enough times to see all of the phase and angular diameter transitions. Here’s a video of Venus in the heliocentric model of the universe: http://www.youtube.com/watch?v=0Z_v7Tag4fg Again, play it enough times to see all of the phase and angular diameter transitions. If part C of the procedure, you will measure Venus’s phase and angular diameter at different times and then use this information to distinguish between the geocentric and heliocentric models of the universe. 8
B. ORBITS Kepler showed that planets orbiting the sun and moons orbiting planets do not travel on circles, but on ellipses, with the central body at one of the two foci: The long axis of an ellipse is called the major axis. Half of the major axis is called the semi-major axis, which is usually denoted a. 9
Page 1 and 2: 3. THE GALILEAN REVOLUTION: EARTH
Page 3 and 4: 3. He discovered four moons orbitin
Page 5 and 6: In Aristotle’s (and later Ptolemy
Page 7: The heliocentric model of the unive
Page 11 and 12: PROCEDURE A. MONITOR A PLANETARY SY
Page 13 and 14: Request two exposures (just in case
Page 15 and 16: In the following tutorial, you will
Page 17 and 18: Once the angular diameter of the pl
Page 19 and 20: EXERCISE 4: MEASURE THE MASS OF THE
Page 21 and 22: C. VENUSIAN PHASES Venus’s angula
Page 23 and 24: DATA TABLE 1: PLANETARY MOONS Plane

3. THE GALILEAN REVOLUTION: EARTH'S PLACE IN THE SOLAR ...

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