Java applet page:
To conform with all astrolabes made in earlier times,
the view of the stars initially shown on this astrolabe
is a left-to-right mirror image
of the way they appear
when we look at the stars from the earth's surface.
This initial view is the one you would have
if you looked down on the 'celestial sphere' from
above - a 'heavens' view.
If you would prefer the astrolabe to show the stars as you are used to seeing them from the earth's surface - an 'earth' view - the easy way to change it is to click on the view+/- button.
You can also use the menu to select the viewpoint: