exercise1.6a_VenusPhases

exercise1.6a_VenusPhases - Exercise 1.6a: The Phases of...

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Exercise 1.6a: The Phases of Venus In this exercise we will draw the phases of Venus that result from the Ptolemaic and Copernican models of the solar system. Galileo observed with his primitive telescope that Venus went through nearly a full cycle of phases. Through geometric considerations we will try to determine whether this is consistent with one model, both, or neither. The diagram to the left shows an example configuration for the Earth, Sun, and Venus looking down onto the plane of the solar system. Note that Venus is shown twice -- the single circle represents the location of Venus in space. We will use the circle in the box to draw the sketch of the appearance of Venus as seen from the (N. hemisphere of the) Earth for this configuration. To determine the phase of Venus from the Earth, first draw line A. This is simply a line from the center of the Sun to the center of Venus. Next draw line B. This line is perpendicular to line A and effectively cuts Venus in half. The half of Venus facing
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This document was uploaded on 10/27/2011 for the course ASTR 104 at UNL.

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exercise1.6a_VenusPhases - Exercise 1.6a: The Phases of...

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