Use the Starry Night Enthusiast™ program to observe the Sun’s motion on the celestial sphere. Click the Home button in the toolbar. Open the Options pane and expand the Local View layer. Turn off the Daylight and Local Horizon options. Under the Guides layer, turn on The Ecliptic and the Celestial Grid options. Note that the Celestial Equator is between the 15° and 15° lines of declination. Open the Find pane and double-click the entry for the Sun to center the Sun in the view. Make sure you can see at least 90° of the celestial sphere. a. Under the Constellations layer of the Options pane, select Auto Identify. In which constellation is the Sun located today? Is this the same constellation as the astrological sign for today’s date (see Table 1-1)? b. Be sure the view is locked on the Sun by opening the contextual menu (right-click over the Sun on a PC or Ctrl-click on a Mac) and selecting Center. Set the Time Flow Rate to 1 day and start time flow (adjust flow rate, as necessary). Observe the Sun for a full year of simulated time (or more). Note the constellations through which it passes. How many are there? In which constellations does it cross the celestial equator? What path does it follow?
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