Tilting rotation plane

Hey there!
I just finished implementing our solar system as a funny exercise with rotation and all. But in reality the rotation planes are tilted, as seen alongside the x axis. So thats like a brick wall for me at the moment, as well as the other thing (not quite important but i tried to wrap my mind around that one too) where the orbits are not circles but rather ellipses. Any thoughts on how to implement either of those??

Information: rotation is done by adding a node, adding the planet as a child and letting the node rotate.

Thanks in advance,

These might help with the tilted orbit thing:

thx pspeed :), already knew those two links but didnt think of it in the right way to get it to work… but now it does :wink: any thoughts on the ellipses thing??