Lets hope that some of them have stations in this game.
http://www.fromquarkstoquasars.com/runaway-planets-the-rogues-of-the-universe/
"Let’s say an inward moving planet is five times the mass of Jupiter. It can gravitationally eject a smaller planet. Even one that’s as massive as Jupiter! This implies that there could be several rogue planets that were ejected from every system that has a hot Super-Jupiter orbiting unusually close to its parent star (in fact, such scenarios are likely). Believe it or not, we’ve recently discovered that these rogue planets are VERY common. In fact, there may be nearly twice as many of them as there are stars!"
http://www.fromquarkstoquasars.com/runaway-planets-the-rogues-of-the-universe/
"Let’s say an inward moving planet is five times the mass of Jupiter. It can gravitationally eject a smaller planet. Even one that’s as massive as Jupiter! This implies that there could be several rogue planets that were ejected from every system that has a hot Super-Jupiter orbiting unusually close to its parent star (in fact, such scenarios are likely). Believe it or not, we’ve recently discovered that these rogue planets are VERY common. In fact, there may be nearly twice as many of them as there are stars!"
