If you're into astronomy, or just into understanding how everything relates to everything else, check out this innovative way to look at the very small, and the very, very large.
"...Nikon's Universcale web app. It puts the entire universe into proportion, from the smallest particle to the largest measurements of space.
From the femtometer to the light year, Universcale spans 40 magnitudes of measurement into a single cosmic web app. It's really amazing when you zoom all the way out into stars and galaxies and realize that every time you go a magnitude higher, everything you saw before, from the flea to Mount Everest, is contained in this tiny little grid in the lower-left side of the screen. Of course, the Carl Sagan-should-be-narrating-this planetarium music helps."
It's a tw0-dimensional, web version of the famous powers of ten video sponsored by IBM in 1997. Although that video is not available due on YouTube to a copyright claim, here's a twist on that video from YouTube:
You do get more out of the Universcale application when you spend a little time interacting with it. But it's pretty rewarding in the end. Recommended.