Space is big.
You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space. Hitchhiker's Guide To The Galaxy Image credit: NASA/JPL-Caltech/ESA/CXC/STScI
http://photojournal.jpl.nasa.gov/catalog/PIA12348