Fully manipulable model.
Try it.
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These are my self-study materials. Let me know how I can make them more useful to you.
[b]Unit Sphere[/b]
[list]
[*]Setup: [url]http://www.geogebratube.org/material/show/id/101282[/url]
[*]Trihedron: [url]http://www.geogebratube.org/material/show/id/107064[/url]
[*][b] → Base Object[/b]
[*] Spherical Coordinates {link}
[*] Meridian, (Horizon Points)
[*] Latitude, (Horizon Points)
[/list]
