To anyone that want to help me: Can you write me an example like the sun-earth-moon. The earth turning around the sun in a bit inclinated orbit, and the moon turning around the earth (i can not get this... for me the moon turns around the sun) in a inclinated orbit too... For example like this... > > > ---- Ö-------- Ö ------------ SUN ---------- <- principal plane Here Ö ------- / Ö / -------- <- Here the earth / turning around Sun Moon inclinated ----> / orbit inclinated 45 degrees respect to 10 degrees earth plane Would you do that ??? very SIMPLE !!! simple spheres or cubes !!! it doesnt matter... what I want to learn is to do 1) inclinated orbits with animation 2) bodies turning around a body that turns around another one (like sun-earth-moon) PLEASE !!!!!!! THANK u in advance ALL WHAT I CAN DO IT FOR YOU ASK ME !!!! Naiad ------------------------------------------------------------------- *** Please send administrative requests to <majordomo@sdsc.edu> *** -------------------------------------------------------------------