The three men bent over the chart and once again computed the orbit. It was quiet in the satellite, a busy quiet broken by the click of seeking microswitches and the gentle purr of smooth-running motors. The deep pulsing throb of the air conditioner had stopped: the satellite was in the Earth's shadow and there was no need for cooling the interior. "Well," said Morgan, "it checks. We'll pass within fifty feet of the other satellite. Too close. Think we ought to move?" Kaufman looked at him and d