In response to last week's post on the rapidly increasing ideology of the US Republican Party, Mike Lawrence suggested another way of looking at the DW-NOMINATE ideology data. Rather than simply looking at boxplots of the congress scores by party over time, we could fit a smooth curve to get a better sense of the trends over time.
An orrery is a mechanical device that models the motion of the moon and planets. This being the age of the Internet, we no longer need complicated gears, levers and cranks to simulate such motion: we can use Flash and simulate it on the Web:
The Washington Post has an interactive graphic showing the rate at which the US presidential candidates Barack Obama and Mitt Romney have visited the various states for campaign rallies and fundraisers. Here's how it looks today: