Space is an absence of anything, so there is nothing to hold.
Space are the gaps in the universe.
The universe is virtually infinite in size.
Although I did read somewhere that someone theorised it was saddle shaped.
Of course, there is a lot of stuff aside from all that space. Below is a picture taken by Hubble of what they thought was a blank piece of space:
Go to
www.hubblesite.org/gallery for more pics.
