I once had a dream that was very similar to this video. It was one of my most vivid dreams ever! While it is impossible to understand how big things really are – it does help put some of the smaller issues in perspective.
I am not sure why I did not pay more attention in my college Astronomy class (perhaps it was too much math ;)), but lately I have been throughly enjoying the History Channel’s The Universe show. You can check out video clips and some full episodes online if you are interested. This show does an amazing job at explaining everything using breath taking visuals, interviews with well known scientists, and real world examples (to help you understand scale).
If you have any interest in our universe – give one episode a try!