[quote author=Fu-Kwun Hwang link=topic=1078.msg4053#msg4053 date=1239200854]
I do not understand why
[quote]when I click on the earth, the motion of the moon stops and the moon fall on the earth [/quote]
[/quote]

Me either.
So does the maker of this animation ...



[quote author=Fu-Kwun Hwang link=topic=1078.msg4053#msg4053 date=1239200854]
I created a simulation as what I have interpreted what you need from figure 1 & 2.
[/quote]

Thanks. It's quite perfect in spite of translation problems ;o))
Will it be possible to release the slingshot and the moon separately ?
And when we release the moon, to make the earth disapeare ?

Regards,