A sense of scale.

[FLO]

Really, really clever!

http://www.nikon.co.jp/main/eng/feelnikon/discovery/universcale/index_f.htm

[Vega]

WOW.. great find Steve. A simple way of illustrating a very complicated thing!

[beamish]

Cool,

[CH]

Mindboggling

[mpeniak]

Great find Steve!

[12dstring]

Great site... but I can never comprehend the scale :? madness

I remember being shown a similar site a few years ago:

http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/

not quite as fancy, but it gets the point across. I've shown it to several people since then and they all seem to just say "wow".

All the space inside an atom... all the space between atoms, stars...etc

seems like it's more space than anything to me

therefore I justify my hobby of looking at space.