Kepler Orrery IV . ... Credit Copyright: Ethan Kruse (University of Washington) Explanation: The exoplanet hunting Kepler mission's total for candidate and confirmed multiple planet systems stands at 1,705 worlds in orbit around 685 distant stars. Put all of those exoplanet orbits on the same scale and follow their relative orbital motions to get Kepler Orrery IV. ... The color code indicates a planet's estimated equilibrium surface temperature based on its orbit size and parent star . ...