I need to build a model of the solar system ... I can build models with MED and as you can guess I build the system all in one model, this was ok and looked nice when I used rotate. But I'd like to build all the planets and sun as their own ENTITIES. How would I then get the planets to revolve around the sun and at different speeds and distances. If any one knows of some code examples or a quick snippit to point me in the right direction would be huge .... thanks.