 Why did Gwayne decide that they all had to stay?
Captain Gwayne cursed and rolled over, reaching for his boots. The two he'd drawn, Kaufman and Pinelli, seemed to be totally devoid of any sense of caution. Earth had ordered him to detour here, after leaving his load of deep-sleep stored colonists on Official World 71, to check on any sign of Hennessy. One, at the front, was stuttering into life, and Gwayne dashed for it as the exit port slid back. The two were loaded onto a jeep while men helped Barker and Gwayne stow the bound monster on another before heading back. I want to know what happened to Hennessy and why that ship was buried against detection.
 because it was the best chance at human survival
 to discover all of the secrets on the planet  because it was the best chance at human survival  because everyone outside the hull is beyond saving  to try to save Hennessy and his crew