0' NASA Pics UIC Dullum Mdl ncu UuufU LIC DULLUM [CHU. VVI1 [ CHIOVC LIC ground so that you can see below the horizon. You should now be able to see the star Regulus (which is below the horizon). You can also remove the atmosphere to see the stars more clearly, which is done by pressing the button with a cloud icon marked Atmosphere in the bottom menu. Finally, we will want to switch to a view that is fixed to the stars, so we can track the motion of Mars compared to our reference stars Pollux, Procyon, and Regulus. To do this, press the button on the bottom menu marked 'Switch between equatorial and azimuthal mount" which has a telescope icon on it.
Using your mouse, drag the screen around and zoom in until the "triangle" formed by Pollux, Procyon, and Regulus covers a good portion of the screen, and the screen should be roughly centered on this triangle. Take a thin sheet of clean paper and lay it over the screen. You should be able to see the bright star and Mars through the paper. Carefully tape the top of the paper to the screen, so that it can flap up and down. Make sure the paper completely covers Pollux, Procyon, Regulus, and Mars (if the page can't cover them all, you may have to zoom out a bit using your mouse until they can). Trace the positions of Pollux, Procyon, Regulus, and Mars onto your paper. Write the names of the stars next to their marks. Next to Mars, write the date (10/15/2009).
At this point, turn on the 'Constellation Lines' and 'Constellation Labels' (bottom menu) to help you keep track of where you are in the sky.
Now flip the tracing paper up from the screen and go forwards in time by 10 days (10/25/2009). Place the paper back on the screen and make sure the stars are lined up.