Why haven't we discovered co-orbital exoplanets? Could tides offer a possible answer? - EurekAlert

In our solar system, there are several thousand examples of co-orbital objects: bodies that share the same orbit around the Sun or a planet. The Trojan asteroids are such an example. We have not yet observed any similar co-orbitals in extrasolar systems, desp…

image: The final orbits of the Trojan planet in a rotating reference frame where the primary star and the secondary planet are both fixed, at the left and right X, respectively. The plus sign marks t… [+3764 chars]

full article...