What if we arrange a set of permanent magnets in a manner that it would work like an electric motor so that we can generate a circular motion without the intervention of any external inputs, then use this motion to drive a shaft and unto an electric generator so that we can produce electricity for a very long time without ever being shut down for a very long period of time, perhaps for a thousand years or more or even a million if the machine is provided with a very sufficient amount of lubrication. This way we can send a spacecraft to journey outside our solar system and to other stars that can continuously send information back to Earth along its journey.