Animation showing all the multiple-planet systems discovered by Kepler as of 2/2/2011; orbits go through the entire mission (3.5 years). Hot colors to Cool colors (Red to yellow to green to cyan to blue to gray) are Big planets to Smaller planets, relative to the other planets in the system. You can also view this on YouTube: http://www.youtube.com/watch?v=qRJ30fkyiU4. See also New York Times interactive animation "Kepler's Tally of Planets"
Credit: Daniel Fabrycky