I've just created the first part of an interactive illustration of the red/blue shift detection of an exoplanet. The program illustrates how the planet's mass and orbit radius affects the red and blue shift of light from the star. You can see the real program here: orbit
This will be part of my June 7 presentation to the Temecula Valley Astronomers.
I use this blog as a companion to my website www.brightstarstemeculavalley.org, where I call attention to local light pollution and share my enthusiasm for science and astronomy. I'm also a contributor to www.SkepticalScience.com.