Space belonged to no one, but Earth belonged to all of them. “It’s so small,” Harrison said, having just floated up beside her. Joan nodded. “It’s a midsize planet orbiting a midsize star in a galaxy of a hundred billion stars. In a universe of one hundred billion galaxies.” “With almost five billion people on the planet,” Harrison said. Joan nodded. “Hard to believe any one person has any significance,” he said. “I knew that before, but I never knew it, until now.