Is there any sentient life on Yerak or Isal? In the distant future there are only three habitable planets, Laasp, Yerak, and Isal. All the rest are covered by ice because nearby stars have cooled off or gone supernova. Only two spacecrafts, both on Laasp, are designed to travel in deep space. Both vessels must leave this planet soon. If they don't gamma rays are going to kill both ships' crew.