There is a time for doing and a time for going home. But where is home in an ever-changing universe? ewis," Martha said. "I want to go home." She didn't look at me. I followed her gaze to Earth, rising in the east. It came up over the desert horizon, a clear, bright star at this distance. Right now it was the Morning Star. It wasn't long before dawn. I looked back at Martha sitting quietly beside me with her shawl drawn tightly about her knees. She had waited to see it also, of course. It had be