SkyGazer_Exercise2 - Voyager Sky Gazer The Suns Path Print...

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Voyager Sky Gazer: The Sun’s Path Print out this sheet and follow the instructions, filling in answers on the sheet as you go. When you are done, log onto the course web site at http://angel.msu.edu and type the answers you have written down into the Exercise 2 form in the Lessons area on Angel. This week, all class sections will be measuring the size of Earth by carefully observing the Sun’s path through the sky. In this Sky Gazer exercise, you will be taking a clo ser look at the Sun’s path. The instructions assume that you already know how to set your location on Earth and set the time from doing Exercise 1. 1. Set your location to Lansing. 2. Set the time to noon (12:00:00 PM) on January 22. (Note: The software assum es you want to use standard time unless you tell it otherwise. That’s what you want here, so do not check the “Daylight Savings Time” box.) 3. Where’s the Sun? You should now be looking at the daytime sky, but the Sun might not be visible in your window. You should center the Sun in the window by going to the “View” menu. Move your mouse down the menu to the “Center Planet” item. A submenu should then appear, from which you should choose “Sun.” The Sun should now appear in the center of your window. 4. Turn on the horizon line. Go to the “Display” menu, move down to “Reference Markers” and select “Horizon Line” from the submenu that appears. Can you see the horizon at the bottom of your screen? If you can’t see the horizon, use the scroll bar at right to adjust your view scrolling down will tilt your viewpoint down, bringing the horizon up. If the Sun moves off the top of the window, you might need to zoom out a bit, using the buttons at the lower left of the window.
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