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Planetarium Activity
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Set the deep sky display so that only galaxies are shown. Using "Center on Database," center the display on the first galaxy in Appendix 14. Left click to get information on the galaxy including angular size. Zoom in until the galaxy appears as a large ellipse. Measure the angular sizes of the major and minor axes of the ellipse. Repeat for the next four galaxies in Appendix 14. Compare your results with the angular sizes given in the galaxy information box in the display.







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