Measuring the Universe

Great animation explaining how we go about measuring incredibly large distances. Created by Royal Observatory Greenwich, it takes some pretty big/complex concepts and distills them down in a really cool/fun way (I love the little 40W lightbulb guys).

[Via Dustin Drees]

Related:
Across The Universe: Covers By Rufus Wainwright And Fiona Apple
The Elegant Universe
The Universe Has a Sense of Humor