How Big?

How big is the universe?

http://www.youtube.com/watch?v=YL4cFjmnQT8
From mxuniverse
2min 21sec

http://www.youtube.com/watch?v=yvNhw888XmM
From Moorfo
1min 34sec

http://www.youtube.com/watch?v=CDHw9gZeI5c
From ottoman830
3min 35sec

http://www.youtube.com/watch?v=R5-FaKtaR0E
From angloquebecer
49sec


http://www.youtube.com/watch?v=BGxRWCmwSDE
From viralpatel79
9min 38sec