This animated interactive explains how a research group is using light to measure the speed of objects millions of miles away. Light that is farther away will appear to be a different color than a light that is closer. So by measuring the rate of color shifts, they can estimate velocity.
Light from the center of the galaxy
Projects by FlowingData See All →
How Much Americans Make
Median income only tells you where the middle is. The distributions of income are a lot more interesting.
How Much Minimum Wage Changed in Each State
Minimum wage has increased over the years, but by how much depends on where you live.
Happiness and Health
When one goes down, so does the other. If only there were a way to keep more people healthy.