Some very smart people are kicking around the notion that a planet's moon may have a moon of its own.  The Moon of a Moon will henceforth be known as said planet's MoonMoon (their idea, not mine). 

  Despite not being in any realm even close to your average astronomer or astrophysicist, I still can see some problems with this theory.

  Our Earth has a single Moon.  If we think in terms of offspring, a little Earth MoonMoon does not seem so farfetched.  Of course, NASA might take issue given how many people they've sent or tried to send to the Moon.  I mean, if we went to the Moon but failed to mention little MoonMoon sitting off in the distance, have we really been to the Moon?  So as not to offend, these very smart people believe the Earth once had a MoonMoon but now we don't.  At least I think that's what they meant.  Are they ruling out the Earth having another MoonMoon in the future?  I can only imagine that pending arrival notice.  Baby MoonMoon showers will be the rage.  But, I digress....

   The problem, from my incredibly narrow viewpoint, comes into play with the rest of our solar system.  Being gifted in spatial relationships but horrible at math, I offer the following:  Jupiter has 70+ known Moons, Saturn 50+, Neptune 10+, Uranus 20+.... Perhaps you can see where I'm going with this.  If only half of these Planets known Moons have MoonMoons, I'm pretty sure the Universe is a little more crowded than originally thought.  Now, as I understand it, the Universe has a lot of motion going on and a lot of ice and big chunks of rock thrown in for good measure.    So, let's bring Newton's 2nd into this - I'm no rocket scientist (clearly) but I'm pretty sure this new theory essentially turns our Universe into one big extension of Six Flags Bumper Cars on steroids. 

   Time to go back to sleep.