Re: Google and moons of moons

On 2008-04-16, Jim Dars <jim-dars@[EMAIL PROTECTED]
> wrote:
> MOONS DON'T SEEM TO HAVE MOONS??

Yes, it's very unlikely.  The tidal effects from the parent planet
usually makes an orbit about a moon unstable in the long term.  Also
moons tend to be more irregular than planets, and that also perturbs
orbits.

Nothing prevents a moon from having other bodies orbit it for some
period of time, but it won't last for astronomical timescales.


> I'd be interested in any criteria you WORK OUT, BUT NOT YOU BLUE SKY
> OPINION.  By the way, am I correct that none of the moons in out
> solar system have moons?

I'm pretty sure they don't.  Unless you count our moon having had
artificial satellites orbit it.


- Tim