He knew he was the only man in the universe now. He had found out when the ship passed Pluto, from which vantage point the sun was a dim star, no different from the way it had looked thirty years before when he had left the solar system.But the ships computer had just finished running a parallax measurement that told him Plutos orbit had shifted significantly, from which could be calculated that the sun had lost 4.74% of its mass since his departure, and from this another conclusion could be drawn that made his heart first quiver then freeze.