As far as I know, there are no instances of a moon having its own moon in our solar system.
Is this something that cannot be created because of the gravitational pull of the largest nearby body, or is this something that would be possible given the right circumstances?
It appears, based solely on observing our universe, that the development of the first order moon is rather trivial. But since there are no examples of the second order moon I’m asking about in our solar system, is it simply impossible to form?
If something of the correct size slammed into our moon today, could the resulting debris possibly form a moon for the moon, or would it end up as a second moon for earth, a faint ring for the earth, or just fall back onto the moon?
Capturing a second level moon is also something we can discuss, although I’d think this to be almost impossible given the gravitational pull of the moons parent planet.
Also, with the discovery of new planets around nearby stars, have we been able to detect if these planets have moons, or are the distances so great that detail of this level is currently impossible to detect?