It's said that God is infinite, and everywhere. But what if He isn't? What if it were possible to fly so far out into space that you arrive at a place where God does not exist? How would you know it? What would happen? These questions arise when nearly three dozen astronauts and observers embark on the most daring voyage of exploration in all of human history, a space flight designed to probe the very limits of our universe. Among those on board is...