[quote author=Fu-Kwun Hwang link=topic=2365.msg8848#msg8848 date=1324901907]
I hope this version is closer to what you need!
[/quote]

Yes in fact, it is.
To achieve, I would like to know if the gravitational potential could be an option like "g" and if it's possible to put a legend (planet, object, gravitational force, gravitational field) and to let me do a french version of this simulation.

Thanks in advance (I hope it's the last time ;o))