SkyGazer_Orion - Voyager Sky Gazer: Magnitudes and the Main...

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Voyager Sky Gazer: Orion 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 and type the answers you have written down into the Exercise 5 form in the Lessons area on Angel. This week you have been measuring distance to the star of the constellation Orion using parallax data. In this Sky Gazer exercise, you will observe how Orion rises and sets during the course of a year and determine the best times of year to measure the parallax of Orion’s stars. The instructions assume that you already know how to use Sky Gazer from doing Exercises 1 through 4. 1. Set your location to Lansing. 2. Set the time to 9 PM on February 10, 2008. 3. Center the star Betelgeuse. You can center Betelgeuse in the window by going to the “View” menu, move down to the “The Brightest Stars,” and select “Betelgeuse” from the submenu. The constellation Orion should now appear in the center of your window. If you are having trouble finding it, go to the “Display” menu, move down to “Constellations,” and select “Major Only.” 4. When does Orion rise on this date? Set the step size on the Time Panel to “15 min” and start clicking on the left arrow button to step back in time. Keep clicking until Orion is halfway below the eastern horizon, so that it is just rising. In order to see what is going on, you may need to turn off the daytime sky by going to the “Chart” menu and deselecting “Natural Sky.” You may also want to select “Define Horizon” from the “Control” menu and use it to make the horizon transparent and to show the horizon line. Write down the time at which Orion rises on this date: 5. When does Orion cross the meridian? Turn on the meridian line by going to the “Display” menu, moving down to “Reference Markers” and selecting “Meridian Line” from the submenu. Then start clicking on the right arrow button to make
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This note was uploaded on 03/19/2008 for the course ISP 205L taught by Professor Voit during the Spring '08 term at Michigan State University.

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SkyGazer_Orion - Voyager Sky Gazer: Magnitudes and the Main...

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