The universe is expanding between galactic clusters rather than between solar systems. It seems they aren't at all sure what is doing this, but they are pretty sure gravity drove the inflationary phase.
"The universe is expanding between galactic clusters rather than between solar systems. It seems they aren't at all sure what is doing this, but they are pretty sure gravity drove the inflationary phase." 
Not gravity as we see it today (i.e. our current laws of physics). All mass inside a marble space?! And then space expands away from that massive gravity?!
And then the expansion slows down?!
And then we notice that our universe is still expanding...at an ever increasing rate?!
...except for inside our solar system.
Now why am I not sold on this "inflationary" theory?!