How to rotate object on axis (planet)? Ok Im not sure whether this has been addressed specifically but I have some planet orbit rings that I need to rotate ON the axis, meaning they stay at an angle but rotate -

so far Ive parented the ring to an empty and am just rotating the empty which results in this (NOT good):






The tilt should always be more/less like #1 - how can I do this?
To achieve this particular rotation, you need to change the transformation orientation from global to local 

Then if you press R to rotate and then Z twice, you will rotate the object on its local Z-axis. You don't have to have changed the transformation orientation to achieve this, it just help visualise the axis you're going to use



Hope this helps.