Expanding Universe Comments

This is the classic expanding balloon picture of the UNiverse, where students actually draw galaxies on a balloon and blow it up, then measure the new distances, and try to derive a Hubble Law from this. It's a nice way to picture an expanding universe, and a fun lab to do. There are some good analysis and comprehension questions at the end. When I was learning about the expansion of the universe in college 4 years ago, this is how I came to understand a nice linear Hubble Law.
© 1999 University of Washington
Revised: 3 February, 2000