Dirk Jemson pressed his forehead against the cool metal of the astro-chart and hoped that he was not going to be sick. At any moment, the space cruiser would be entering the gravity field of Caliban, and if he were ordered to assume control ... he shuddered at the prospect. Around him in the cabin, the other members of the crew went quietly about their duties. Allen, the astrogator worked over his charts and calculations; Kennedy, the atochanic squinted worriedly at the readings on his gauges; T