Lissauer and other Kepler scientists submitted a research paper last week saying they had found planets sharing the same orbit, which would be possible if they inhabited a Trojan configuration — named for a Jovian example involving some asteroids. In such a system, involving a planet and a star, there are Lagrange points 60 degrees ahead and 60 degrees behind the planet in which a smaller body can safely orbit. But now, Lissauer says he's skeptical of this interpretation of KOI 730, and that a resonance system could explain the shared orbits. If that's the case, the four planets in KOI 730 would have orbits in the resonances 8:6:4:3. In other words, there are two pairs of planets, and each time the first member of the pair makes three orbits, another planet completes four, IB Times explains.