How to Measure the Red Shift of the Pole Star

If you are running away from an object that is pulsing, each pulse has to travel a little bit farther to get to you. So you can use geometry and all of these different changes in the known pulse rates to get at your exact velocity through space. And this is like the dopler shift, like, i guess, same thing if you were hearing a fire truck drive past you,. It sounds higher as it's moving towards you, and then it sounds lower as it's moved away from you.