Subject: Why is there a limit on the structure of matter?

Considering the structure of matter is made of molecules, which are made 
of atoms, then protons, electrons, neutrons, now quarks, and things even 
smaller. As well, considering the formation of much larger matter 
(planets) which make solar systems, then galaxies, and the universe 
(anything larger???). All this would conclude that space is infinite (we 
can't see a definate end). If space IS actually infinite, how can there be 
a limit on the structure of matter that exists within it? Is the infinite 
actually organized? (what would be the point?)

Re: Why is there a limit on the structure of matter?