Large numbers of anything are hard to grasp.  Take the distance from the Earth to the Moon, for instance.  It varies, but the average distance is 384,400 km.  That is a small enough number to wrap your head around.  Or is it?  How much space is there between the Earth and the Moon?  It turns out that’s a whole lot of space.  Enough so you could fit Mercury and Venus and Mars and Saturn and Uranus and Jupiter and Neptune in between with room to spare!  Yep, every single planet in our solar system can fit between Earth and the Moon.  *head asplode*  You die-hard “Pluto is too a planet!” folks could even fit Pluto in there if you so desire.

Of course, you shouldn’t try this experiment at home because the gravity of Jupiter and Saturn would quickly suck everyone else in and the resultant buildup of temperatures would likely cause a massive explosion turning us back into the star stuff we once were.  This is a thought experiment only.