Дэн Симмонс - Orphans of the Helix

Chief Branchman Keel Redt leaned forward in his couch. Despite the one-tenth g field, all of the couches had restraint systems. His was activated now.

“Please,” said the Ouster, struggling slightly against the harnesses and airbags. “Kill it now. Stop it now.”

Dem Lia shifted to look at the two Ousters and the Templar. “Not yet,” she said. “First we have to return to the Helix.”

“We will lose more valuable time,” broadcast Far Rider, his tone unreadable.

“Yes,” said Dem Lia. “But we still have more than six standard days before it begins harvesting.”

The probe accelerated away from the blackened, cratered, and newly scarred monster.

“You will not destroy it, then?” demanded the Chief Branchman as the probe hurried back to the Helix.

“Not now,” responded Dem Lia. “It might still be serving a purpose for the race that built it.”

The young Templar seemed to be close to tears. “Yet your own instruments—far more sophisticated than our telescopes—told you that there are no worlds in the red giant system.”

Dem Lia nodded. “Yet you yourselves have mentioned the possibility of space habitats, can cities, hollowed-out asteroids… our survey was neither careful nor complete. Our ship was intent upon entering your star system with maximum safety, not carrying out a careful survey of the red giant system.”

“For such a small probability,” said the Chief Branchman Ouster in a flat, hard voice, “you are willing to risk so many of our people?”

Saigyô’s voice whispered quietly in Dem Lia’s subaudio circuit. “The AI’s have been analyzing scenarios of several million Ousters using their solar wings in a concentrated attack on the Helix.” Dem Lia waited, still looking at the Chief Branchman.

“The ship could defeat them,” finished the AI, “but there is some real probability of damage.”

To the Chief Branchman, Dem Lia said, “We’re going to take the Helix to the red giant system. The three of you are welcome to accompany us.”

“How long will the round trip last?” demanded Far Rider.

Dem Lia looked to Saigyô. “Nine days under maximum fusion boost,” said the AI. “And that would be a powered perihelion maneuver with no time to linger in the system to search every asteroid or debris field for life-forms.”

The two Ousters were shaking their heads. Reta Kasteen drew her hood lower, covering her eyes.

“There’s another possibility,” said Dem Lia. To Saigyô, she pointed toward the Helix, now filling the main viewscreen. Thousands of energy-winged Ousters parted as the probe decelerated gently through the ship’s containment field and aligned itself for docking.

They gathered in the solarium to decide. All ten of the humans—Den Soa’s wife and husband had been invited to join in the vote but had decided to stay below in the crew’s quarters—all five of the AIs, and the three representatives of the forest-ring people. Far Rider’s tightbeam continued to carry the video and audio to the three hundred thousand nearby Ousters and the billions waiting on the great curve of tree ring beyond.

“Here is the situation,” said Dem Lia. The silence in the solarium was very thick. “You know that the Helix, our ship, contains an Aenean-modified Hawking drive. Our faster-than-light passage does harm the fabric of the Void Which Binds, but thousands of times less than the old Hegemony or Pax ships. The Aeneans allowed us this voyage.” The short woman with the green band around her turban paused and looked at both Ousters and the Templar woman before continuing. “We could reach the red giant system in…”

“Four hours to spin up to relativistic velocities, then the jump,” said Res Sandre. “About six hours to decelerate into the red giant system. Two days to investigate for life. Same ten-hour return time.”

“Which, even with some delays, would bring the Helix back almost two days before the Destroyer begins its harvesting. If there is no life in the red-giant system, we will use the probe to destroy the robot harvester.”

“But…” said Chief Branchman Keel Redt with an all-too-human ironic smile. His face was grim.

“ But it is too dangerous to use the Hawking drive in such a tight binary system,” said Dem Lia, voice level. “Such short-distance jumps are incredibly tricky anyway, but given the gas and debris the red giant is pouring out…”

“You are correct. It would be folly.” It was Far Rider broadcasting on his radio band. “My clan has passed down the engineering from generation to generation. No commander of any Ouster seedship would make a jump in this binary system.”

True Voice of the Tree Reta Kasteen was looking from face to face. “But you have these powerful fusion engines…”

Dem Lia nodded. “Basho, how long to survey the red-giant system using maximum thrust with our fusion engines?”

“Three and one-half days transit time to the other system,” said the hollow-cheeked AI. “Two days to investigate. Three and one-half days back.”

“There is no way we could shorten that?” said Oam Rai, the yellow. “Cut safety margins? Drive the fusion engines harder?”

Saigyô answered. “The nine-day round-trip is posited upon ignoring all safety margins and driving the fusion engines at one hundred twelve percent of their capacity.” He sadly shook his bald head. “No, it cannot be done.”

“But the Hawking drive…” said Dem Lia, and everyone in the room appeared to cease breathing except for Far Rider, who had never been breathing in the traditional sense. The appointed Spectrum Helix commander turned to the AIs. “What are the probabilities of disaster if we try this?”

Lady Murasaki stepped forward. “Both translations—into and out of Hawking space—will be far too close to the binary system’s Roche lobe. We estimate probability of total destruction of the Helix at two percent, of damage to some aspect of ship’s systems at eight percent, and specifically damage to the pod life-support network at six percent.”

Dem Lia looked at the Ousters and the Templar. “A six percent chance of losing hundreds—thousands—of our sleeping relatives and friends. Those we have sworn to protect until arrival at our destination. A two percent chance that our entire culture will die in the attempt.”

Far Rider nodded sadly. “I do not know what wonders your Aenean friends have added to your equipment,” he broadcast, “but I would find those figures understated. It is an impossible binary system for a Hawking drive jump.”

Silence stretched. Finally Dem Lia said, “Our options are to destroy the harvesting machine for you without knowing if there is life—perhaps an entire species—depending upon it in the red giant system, however improbable. And we cannot do that. Our moral code prevents it.”

Reta Kasteen’s voice was very small. “We understand.”

Dem Lia continued, “We could travel by conventional means and survey the system. This means you will have to suffer the ravages of this Destroyer a final time, but if there is no life in the red giant system, we will destroy the machine when we return on fusion drive.”

“Little comfort to the thousands or millions who will lose their homes during this final visit of the Destroyer,” said Chief Branchman Keel Redt.

“No comfort at all,” agreed Dem Lia.

Far Rider stood to his full four-meter height, floating slightly in the one-tenth gravity. “This is not your problem,” he broadcast. “There is no reason for you to risk any of your people. We thank you for considering…”

Dem Lia raised a hand to stop him in mid-broadcast. “We’re going to vote now. We’re voting whether to jump to the red giant system via Hawking drive and get back here before your Destroyer begins destroying. If there is an alien race over there, perhaps we can communicate in the two days we will have in-system. Perhaps they can reprogram their machine. We have all agreed that the odds against it accidentally 'eating' your seedship on its first pass after you landed are infinitesimal. The fact that it constantly harvests areas on which you’ve colonized—on a tree ring with the surface area equal to half a million Hyperions—suggests that it is programmed to do so, as if eliminating abnormal growths or pests.”