The Size of the Human Radio-Broadcast Bubble in the Milky Way Galaxy
Pale blue dot feels like an apt comparison --> http://en.wikipedia.org/wiki/File:Pale_Blue_Dot.pngIf you don't know yet, that's what earth looks like from just beyond Pluto's orbit.Also interesting to note in these discussions is the Hubble deep field image. These 3000-ish galaxies are covered by a quarter at arm's length when you look into the sky --> http://en.wikipedia.org/wiki/File:HubbleDeepField.800px.jpgWe are indeed small and insignificant, but alone? Doubtful at best.