“Yes, sir.”
We started to rig the punctured, splayed-out hide as a rough canopy over our LUP, blocking as much of the sunlight as possible from Pael. A few slivers of frozen flesh still clung to the hide, but mostly it was like working with a fine, light metallic foil.
In the sudden shade, Pael was starting to stir. His moans were translated to stark bioluminescent icons.
“Help him,” Jeru snapped. “Make him drink.” And while I did that she dug into the med kit on her belt and started to spray cast material around the fingers of her left hand.
“It’s the speed of light,” Pael said. He was huddled in a corner of our LUP, his legs tucked against his chest. His voice must have been feeble; the bioluminescent sigils on his suit were fragmentary and came with possible variants extrapolated by the translator software.
“Tell us,” Jeru said, relatively gently.
“The Ghosts have found a way to change lightspeed in this fortress. In fact to increase it.” He began talking again about quagma and physics constants and the rolled-up dimensions of spacetime, but Jeru waved that away irritably.
“How do you know this?”
Pael began tinkering with his prisms and gratings. “I took your advice, Commissary.” He beckoned to me. “Come see, child.”
I saw that a shaft of red light, split out and deflected by his prism, shone through a diffraction grating and cast an angular pattern of dots and lines on a scrap of smooth plastic behind.
“You see?” His eyes searched my face.
“I’m sorry, sir.”
“The wavelength of the light has changed. It has been increased. Red light should have a wavelength, oh, a fifth shorter than that indicated by this pattern.”
I was struggling to understand. I held up my hand. “Shouldn’t the green of this glove turn yellow, or blue… ?”
Pael sighed. “No. Because the color you see depends, not on the wavelength of a photon, but on its energy. Conservation of energy still applies, even where the Ghosts are tinkering. So each photon carries as much energy as before—and evokes the same ‘color.’ Since a photon’s energy is proportional to its frequency, that means frequencies are left unchanged. But since lightspeed is equal to frequency multiplied by wavelength, an increase in wavelength implies—”
“An increase in lightspeed,” said Jeru.
“Yes.”
I didn’t follow much of that. I turned and looked up at the light that leaked around our Ghost—hide canopy. “So we see the same colors. The light of that star gets here a little faster. What difference does it make?”
Pael shook his head. “Child, a fundamental constant like lightspeed is embedded in the deep structure of our universe. Lightspeed is part of the ratio known as the fine structure constant.” He started babbling about the charge on the electron, but Jeru cut him off.
She said, “Case, the fine structure constant is a measure of the strength of an electric or magnetic force.”
I could follow that much. “And if you increase lightspeed—”
“You reduce the strength of the force.” Pael raised himself. “Consider this. Human bodies are held together by molecular binding energy—electromagnetic forces. Here, electrons are more loosely bound to atoms; the atoms in a molecule are more loosely bound to each other.” He rapped on the cast on my arm. “And so your bones are more brittle, your skin more easy to pierce or chafe. Do you see? You too are embedded in spacetime, my young friend. You too are affected by the Ghosts’ tinkering. And because lightspeed in this infernal pocket continues to increase—as far as I can tell from these poor experiments—you are becoming more fragile every second.”
It was a strange, eerie thought: that something so basic in my universe could be manipulated. I put my arms around my chest and shuddered.
“Other effects,” Pael went on bleakly. “The density of matter is dropping. Perhaps our structure will eventually begin to crumble. And dissociation temperatures are reduced.”
Jeru snapped, “What does that mean?”
“Melting and boiling points are reduced. No wonder we are overheating. It is intriguing that bio systems have proven rather more robust than electromechanical ones. But if we don’t get out of here soon, our blood will start to boil… .”
“Enough,” Jeru said. “What of the star?”
“A star is a mass of gas with a tendency to collapse under its own gravity. But heat, supplied by fusion reactions in the core, creates gas and radiation pressures that push outward, counteracting gravity.”
“And if the fine structure constant changes—”
“Then the balance is lost. Commissary, as gravity begins to win its ancient battle, the fortress star has become more luminous—it is burning faster. That explains the observations we made from outside the cordon. But this cannot last.”
“The novae,” I said.
“Yes. The explosions, layers of the star blasted into space, are a symptom of destabilized stars seeking a new balance. The rate at which our star is approaching that catastrophic moment fits with the lightspeed drift I have observed.” He smiled and closed his eyes. “A single cause predicating so many effects. It is all rather pleasing, in an aesthetic way.”
Jeru said, “At least we know how the ship was destroyed. Every control system is mediated by finely tuned electromagnetic effects. Everything must have gone crazy at once… .”
We figured it out. The Brief Life Burns Brightly had been a classic GUTship, of a design that hasn’t changed in its essentials for thousands of years. The lifedome, a tough translucent bubble, contained the crew of twenty. The ’dome was connected by a spine a klick long to a GUTdrive engine pod.
When we crossed the cordon boundary—when all the bridge lights failed—the control systems went down, and all the pod’s superforce energy must have tried to escape at once. The spine of the ship had thrust itself up into the lifedome, like a nail rammed into a skull.
Pael said dreamily, “If lightspeed were a tad faster, throughout the universe, then hydrogen could not fuse to helium. There would only be hydrogen: no fusion to power stars, no chemistry. Conversely if lightspeed were a little lower, hydrogen would fuse too easily, and there would be no hydrogen, nothing to make stars—or water. You see how critical it all is? No doubt the Ghosts’ science of fine-tuning is advancing considerably here on the Orion Line, even as it serves its trivial defensive purpose… “
Jeru glared at him, her contempt obvious. “We must take this piece of intelligence back to the Commission. If the Ghosts can survive and function in these fast-light bubbles of theirs, so can we. We may be at the pivot of history, gentlemen.”
I knew she was right. The primary duty of the Commission for Historical Truth is to gather and deploy intelligence about the enemy. And so my primary duty, and Pael’s, was now to help Jeru get this piece of data back to her organization.
But Pael was mocking her.
“Not for ourselves, but for the species. Is that the line, Commissary? You are so grandiose. And yet you blunder around in comical ignorance. Even your quixotic quest aboard this cruiser was futile. There probably is no bridge on this ship. The Ghosts’ entire morphology, their evolutionary design, is based on the notion of cooperation, of symbiosis; why should a Ghost ship have a metaphoric head? And as for the trophy you have returned—” He held up the belt of Ghost artifacts. “There are no weapons here. These are sensors, tools. There is nothing here capable of producing a significant energy discharge. This is less threatening than a bow and arrow.” He let go of the belt; it drifted away. “The Ghost wasn’t trying to kill you. It was blocking you. Which is a classic Ghost tactic.”
Jeru’s face was stony. “It was in our way. That is sufficient reason for destroying it.”
Pael shook his head. “Minds like yours will destroy us, Commissary.”
Jeru stared at him with suspicion. Then she said, “You have a way. Don’t you, Academician? A way to get us out of here.”
He tried to face
her down, but her will was stronger, and he averted his eyes.
Jeru said heavily, “Regardless of the fact that three lives are at stake—does duty mean nothing to you, Academician? You are an intelligent man. Can you not see that this is a war of human destiny?”
Pael laughed. “Destiny—or economics?”
I looked from one to the other, dismayed, baffled. I thought we should be doing less yapping and more fighting.
Pael said, watching me, “You see, child, as long as the explorers and the mining fleets and the colony ships are pushing outward, as long as the Third Expansion is growing, our economy works. The riches can continue to flow inward, into the mined-out systems, feeding a vast horde of humanity who have become more populous than the stars themselves. But as soon as that growth falters… “
Jeru was silent.
I understood some of this. The Third Expansion had reached all the way to the inner edge of our spiral arm of the galaxy. Now the first colony ships were attempting to make their way across the void to the next arm.
Our arm, the Orion Arm, is really just a shingle, a short arc. But the Sagittarius Arm is one of the galaxy’s dominant features. For example, it contains a huge region of star-birth, one of the largest in the galaxy, immense clouds of gas and dust capable of producing millions of stars each. It was a prize indeed.
But that is where the Silver Ghosts live.
When it appeared that our inexorable expansion was threatening not just their own mysterious projects but their home system, the Ghosts began, for the first time, to resist us.
They had formed a blockade, called by human strategists the Orion Line: a thick sheet of fortress stars, right across the inner edge of the Orion Arm, places the Navy and the colony ships couldn’t follow. It was a devastatingly effective ploy.
This was a war of colonization, of world-building. For a thousand years we had been spreading steadily from star to star, using the resources of one system to explore, terraform and populate the worlds of the next. With too deep a break in that chain of exploitation, the enterprise broke down.
And so the Ghosts had been able to hold up human expansion for fifty years.
Pael said, “We are already choking. There have already been wars, young Case: humans fighting human, as the inner systems starve. All the Ghosts have to do is wait for us to destroy ourselves, and free them to continue their own rather more worthy projects.”
Jeru floated down before him. “Academician, listen to me. Growing up at Deneb, I saw the great schooners in the sky, bringing the interstellar riches that kept my people alive. I was intelligent enough to see the logic of history—that we must maintain the Expansion, because there is no choice. And that is why I joined the armed forces, and later the Commission for Historical Truth. For I understood the dreadful truth which the Commission cradles. And that is why we must labor every day to maintain the unity and purpose of mankind. For if we falter we die; as simple as that.”
“Commissary, your creed of mankind’s evolutionary destiny condemns our own kind to become a swarm of children, granted a few moments of loving and breeding and dying, before being cast into futile war.” Pael glanced at me.
“But,” Jeru said, “it is a creed that has bound us together for a thousand years. It is a creed that binds uncounted trillions of human beings across thousands of light years. It is a creed that binds a humanity so diverse it appears to be undergoing speciation… . Are you strong enough to defy such a creed now? Come, Academician. None of us chooses to be born in the middle of a war. We must all do our best for each other, for other human beings; what else is there?”
I touched Pael’s shoulder; he flinched away. “Academician—is Jeru right? Is there a way we can live through this?”
Pael shuddered. Jeru hovered over him.
“Yes,” Pael said at last. “Yes, there is a way.”
The idea turned out to be simple.
And the plan Jeru and I devised to implement it was even simpler. It was based on a single assumption: Ghosts aren’t aggressive. It was ugly, I’ll admit that, and I could see why it would distress a squeamish earthworm like Pael. But sometimes there are no good choices.
Jeru and I took a few minutes to rest up, check over our suits and our various injuries, and to make ourselves comfortable. Then, following patrol SOP once more, we made our way back to the pod of immature hides.
We came out of the tangle and drifted down to that translucent hull. We tried to keep away from concentrations of Ghosts, but we made no real effort to conceal ourselves. There was little point, after all; the Ghosts would know all about us, and what we intended, soon enough.
We hammered pitons into the pliable hull, and fixed rope to anchor ourselves. Then we took our knives and started to saw our way through the hull.
As soon as we started, the Ghosts began to gather around us, like vast antibodies.
They just hovered there, eerie faceless baubles drifting as if in vacuum breezes. But as I stared up at a dozen distorted reflections of my own skinny face, I felt an unreasonable loathing rise up in me. Maybe you could think of them as a family banding together to protect their young. I didn’t care; a lifetime’s carefully designed hatred isn’t thrown off so easily. I went at my work with a will.
Jeru got through the pod hull first.
The air gushed out in a fast-condensing fountain. The baby hides fluttered, their distress obvious. And the Ghosts began to cluster around Jeru, like huge light globes.
Jeru glanced at me. “Keep working, tar.”
“Yes, sir.”
In another couple of minutes I was through. The air pressure was already dropping. It dwindled to nothing when we cut a big door-sized flap in that roof. Anchoring ourselves with the ropes, we rolled that lid back, opening the roof wide. A few last wisps of vapor came curling around our heads, ice fragments sparkling.
The hide babies convulsed. Immature, they could not survive the sudden vacuum, intended as their ultimate environment. But the way they died made it easy for us.
The silvery hides came flapping up out of the hole in the roof, one by one. We just grabbed each one—like grabbing hold of a billowing sheet—and we speared it with a knife, and threaded it on a length of rope. All we had to do was sit there and wait for them to come. There were hundreds of them, and we were kept busy.
I hadn’t expected the adult Ghosts to sit through that, non-aggressive or not; and I was proved right. Soon they were clustering all around me, vast silvery bellies looming. A Ghost is massive and solid, and it packs a lot of inertia; if one hits you in the back you know about it. Soon they were nudging me hard enough to knock me flat against the roof, over and over. Once I was wrenched so hard against my tethering rope it felt as if I had cracked another bone or two in my foot.
And, meanwhile, I was starting to feel a lot worse: dizzy, nauseous, overheated. It was getting harder to get back upright each time after being knocked down. I was growing weaker fast; I imagined the tiny molecules of my body falling apart in this Ghost—polluted space.
For the first time I began to believe we were going to fail.
But then, quite suddenly, the Ghosts backed off. When they were clear of me, I saw they were clustering around Jeru.
She was standing on the hull, her feet tangled up in rope, and she had knives in both hands. She was slashing crazily at the Ghosts, and at the baby hides that came flapping past her, making no attempt to capture them now, simply cutting and destroying whatever she could reach. I could see that one arm was hanging awkwardly—maybe it was dislocated, or even broken—but she kept on slicing regardless.
And the Ghosts were clustering around her, huge silver spheres crushing her frail, battling human form.
She was sacrificing herself to save me—just as Captain Teid, in the last moments of the Brightly, had given herself to save Pael. And my duty was to complete the job.
I stabbed and threaded, over and over, as the flimsy hides came tumbling out of that hole, slowly dying.
I looked up, blinking to get the salt sweat out of my eyes. A few hides were still tumbling around the interior of the pod, but they were inert and out of my reach. Others had evaded us and gotten stuck in the tangle of the ship’s structure, too far and too scattered to make them worth pursuing further. What I had got would have to suffice.
I started to make my way out of there, back through the tangle, to the location of our wrecked yacht, where I hoped Pael would be waiting.
I looked back once. I couldn’t help it. The Ghosts were still clustered over the ripped pod roof. Somewhere in there, whatever was left of Jeru was still fighting.
I had an impulse, almost overpowering, to go back to her. No human being should die alone. But I knew I had to get out of there, to complete the mission, to make her sacrifice worthwhile.
So I got.
Pael and I finished the job at the outer hull of the Ghost cruiser.
Stripping the hides turned out to be as easy as Jeru had described. Fitting together the Planck-zero sheets was simple too—you just line them up and seal them with a thumb. I got on with that, sewing the hides together into a sail, while Pael worked on a rigging of lengths of rope, all fixed to a deck panel from the wreck of the yacht. He was fast and efficient: Pael, after all, came from a world where everybody goes solar sailing on their vacations.
We worked steadily, for hours.
I ignored the varying aches and chafes, the increasing pain in my head and chest and stomach, the throbbing of a broken arm that hadn’t healed, the agony of cracked bones in my foot. And we didn’t talk about anything but the task in hand. Pael didn’t ask what had become of Jeru, not once; it was as if he had anticipated the commissary’s fate.
We were undisturbed by the Ghosts through all of this.
I tried not to think about whatever emotions churned within those silvered carapaces, what despairing debates might chatter on invisible wavelengths. I was, after all, trying to complete a mission. And I had been exhausted even before I got back to Pael. I just kept going, ignoring my fatigue, focusing on the task.
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