Cary Huang's Scale of the Universe.
It's been a grimmer week than normal in the parts of the world I cover (scroll through my posts for the past few days). A friend emailed me Cary Huang's Scale of the Universe graphic recently, and I think i've opened it up about 5 times since and almost instantly felt better.
It's a bit of science geek art, which allows you to explore the relative scale of things in the universe from the smallest subatomic particle to the Stingray Nebula and beyond. My first time playing with the graphic I got the feeling i once had while snorkeling over a coral bed in shallow water that suddenly dropped off to a few thousand feet deep: Exhilarated, a little frightened, mostly in awe.
Here's the link again. Once it loads, press "start" and slide the scale at the bottom left (smaller) and right (bigger). It's very easy to figure out.