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Planetarium Activity
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Set your latitude to 90º. Set the field of view to 100º and scroll to any azimuth. Scroll to altitude 0º. Turn off the daylight by clicking on the blue button on the horizontal toolbar. Set the step size to 1 minute and start the clock. Observe how the stars move relative to the horizon. Compare what you see to Figure 2.7. Scroll upward to altitude 90º and restart the clock. Observe how the stars move and compare what you see with Figure 2.7. Change your latitude to 0º, the equator. Scroll to azimuth 0º. This shows you the northern horizon. Start the clock and observe how the stars move. Compare what you see with Figure 2.8. Scroll to azimuth 90º. Restart the clock. Observe how the stars move as they rise, particularly the angle the tracks of the stars make with respect to the horizon. Compare what you see to what you would expect to see where you live.







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