Hello. Not wishing to rain on anyone's parade, or cloud over their astrolabe sky, but there are also several nice programs available for Macintosh that do a more-than-adequate job of showing the sky and the paths of celestial objects. MacAstro is one I enjoy using, and it is certainly precise when I compare its output to the observed position of objects outside my Berkeley window.
- andrew johnson Berkeley CA 122 15' 20'' West Longitude 37 51' 18'' North Latitude 208'/63.4m Street Elevation
