Powers of 10 interactive. At least somehow, because this approach is much more graphical. Found on the page of camera-manufacturer Nikon, this site shows you scales of things in relation to each other - from the smallest speck of matter (atoms and smaller) to the largest planets and far beyond. Explanatory graphics will give you a real idea of your place on the planet - or indeed the universe.
Goto Universcale

And if you have never seen “Powers of Ten” by Ray and Charles Eames, please watch it now!