Time for the Stars : Travel to other planets is now a reality, and with overpopulation stretching the resources of Earth, the necessity to find habitable worlds is growing ever more urgent. There's a problem, though - because the spaceships are slower than light, any communication between the ships and Earth would take years. Tom and Pat are identical twin teenagers. As twins they've always been close, so close that it seemed like they could read each others' minds. When they are recruited by the Long Range Foundation, the twins find out that they can, indeed, peer into each other's thoughts. Along with other telepathic duos, they are enlisted to be the human transmitters and receivers that will keep the ships in contact with Earth. But there's a catch: one of them has to stay behind - and that one will grow old - while the other explores the depths of space and returns as a young man still.