Turn off the daylight and horizon displays. Use the
"Selection" button and click on "Find." In the window,
type in Mizar and then click "Find." This will center the
display on the bright star Mizar, in Ursa Major. Zoom in
until the field of view is about 1 minute of arc. You will
see that Mizar is actually a double star. Using the Angular
Separation Tool, measure the angular separation of the
two stars.
