mrdoob/three.js — pull request #3557 by lutangar (2013-06-12 09:38:49+00:00)
Title: Added planetary system animation example using pivots 

This example of a planetary system, illustrates the use of 'pivots' to simplify the animation process and thus not dealing with rotations composition manually.

As seen in [Rotating around a moving point](https://github.com/mrdoob/three.js/issues/1830) for example.