I find it hard to grasp how huge the universe is.
I was just over at discover magazine looking at their top 24 deep space pictures of 2011 and one sentence caused me just to shake my head at how massive the universe really is.
It's a spiral galaxy, like ours. It has multiple arms, wound fairly tightly, like ours, several of which split and have disconnected spurs, like ours. It even has that rectangular feature in the middle called a bar, caused by the odd gravitational interactions of several billion stars as they orbit near the galactic center.
So this part of this galaxy is made up of billions of stars...It just floors me.