Hey guys. My dad has recently come to love astronomy,

Hey guys. My dad has recently come to love astronomy, and was especially interested when we viewed Jupiter throught our telescope. So for Christmas i was thinking of making him a 3D printer orrery. But im not sure where to begin. The earth (tilt and actuall rotaion) must be relatively accurate and with a motor ill choose real time or x10 or x100 the acctual time. I dont need all the planets (in fact i was going to do just a simple 1 of the inner planets minuse mars, and make it more detailed.) I just dont know how to get the gear scaling and such. Do you have any clues? This may have to be a easter gift b/c i imagine it will take awhile.

Thanks

& guide here:

other good read:
https://hackerspacewiki.physics.ualberta.ca/index.php?title=3D_Printed_Solar_System_Models

@Marty_G wow! thanks a bunch

That is really awesome!