Why can't you go home again after years in space? There had to be an answer ... could he find it in time, though? itting at his desk, Colonel Halter brought the images on the telescreen into focus. Four booster tugs were fastening, like sky-barnacles, onto the hull of the ancient derelict, Alpha . He watched as they swung her around, stern down, and sank with her through the blackness, toward the bluish-white, moon-lighted arc of Earth a thousand miles below. He pressed a button. The image of tu