 His ideas are regarded as being too speculative; the consensus is that Watchers are simply a form of weaponry left over from the suicide of biological races, and the Swarmer invasion is a grab for a new world.At Ross 128, a Ganymede-like moon is found with a Watcher in orbit.Initially it is taken as a disproof of Walmsley's idea that Watchers will appear around any depopulated world that had once harboured technologically advanced biological life.