The Vance Protocol: Approach Vector 7 g

The transition hit her spine before her eyes understood it.

Mira Quan braced both palms against the helm rail as the deck pitched beneath her boots. A sound crawled through the hull, a low groan that started at the keel and climbed through bulkheads until it lodged somewhere behind her teeth. The Vance Drive wound down in stages, its harmonic signature collapsing from a chord into a single wavering note, then into silence so sudden it felt like pressure.

Screens flared. Charts redrew themselves in stuttering rows. The viewport ahead, blank a heartbeat earlier, now showed stars. Not the smeared streaks of transit but points, hard and cold and far too still after seventeen days of smeared light.

Sector 7-G.

Mira released the rail. Her fingerprints had left pale ovals in the oxidized steel. She flexed her hands, counted her own pulse against the soft chime of the drive's cool-down cycle, and let herself breathe.

"Vance-One," she said into the open channel. "All stations, transition complete. Confirm."

Pavel Soren's voice came back before the echo died, low, unhurried, with the faint drawl of someone who had grown up around engines and never quite shaken the oil from his consonants. "Helm confirms. Drive is cold. Reaction mass nominal. We are at the edge, Commander."

The edge. He said it the way a cartographer might say the coast. Mira turned from the viewport. Behind her, the bridge of Vance-One was a low, oval space crowded with consoles, cable bundles, and the smell of warm polymer that never quite vented. Three stations were manned. Four should have been. The fourth chair sat empty against the aft bulkhead, its harness unbuckled, its displays dark. Mira did not look at it.

"Edges have a way of moving," she said.

"Edges do," Pavel replied. "This one does not."

Yara Okonkwo leaned back from the sensor rig, pushing a strand of close-cropped hair from her forehead with the heel of her palm. Her screen cast a pale green wash across her jaw. She did not smile, but the corner of her mouth twitched, the way it did when she had already found something and was deciding how much of it to share.

"Confirming Pavel," she said. "Boundary is where the charts said it would be. Drift is within tolerance. Whatever is out there, Mira, it is not pushing back."

Mira crossed the deck in four strides and dropped into the operations chair beside Yara. The harness clicked against her shoulders, heavier than it needed to be. She brought the passive sensor feed up on her own display. Numbers filled the panel in orderly columns, and beyond the numbers, a thin grey curve traced the edge of mapped space as they knew it.

Beyond the curve, the grey gave way to black.

Nothing. No echoes. No chatter. No background hiss of natural radiation that any inhabited sector carried like breath. Mira had flown through empty places before. The Kessar Reach had been empty, the deep lanes beyond Callisto had been empty. But empty was a relative term. Empty meant quiet. This felt like absence.

"Sable," Mira said. "Are you seeing what I am seeing?"

The reply came from the comms stack, not from the deck. Sable Hsu was not on the bridge. She had not left her quarters in nineteen hours, and Mira had stopped pretending to insist. "I am seeing what you are not seeing," Sable said. "Which is to say, everything. If you want the polite version, the spectrum is clean. If you want the honest version, Commander, the spectrum is the kind of clean that makes me want to check the equipment twice."

"Have you?"

"Three times. Four times. I have personally insulted two receivers and a relay junction. They are not talking, which means either they have broken, or they have nothing to say. I am inclined to suspect the latter."

Mira allowed herself the smallest exhale. "What about the survey package?"

"Spinning up. Twenty minutes to first sweep. If there is anything out there smaller than a moon and warmer than vacuum, it will tell us. If there is anything stranger than that, it will tell us something else, and I will need coffee before I can explain it to anyone, including myself."

"Coffee is on my tab," Mira said.

"I will remember that. Hsu out."

The channel went quiet. Mira sat with her hands resting on her thighs, watching the grey curve hold steady on her display. Sector 7-G began where the curve ended, and the curve was patient. It did not move.

Pavel called across the deck. "Commander. You will want to see this."

She turned. Pavel had not moved from the helm. His console showed the same feed hers did, but he had pulled up a secondary layer, the one buried beneath navigation. She rose and crossed back to his station. The light there was warmer, amber, the color of shipboard night cycles. Pavel's profile was unreadable. He was a careful man, and careful men saved their faces for the moments that mattered.

"This," he said, and tapped a single key.

A waveform appeared on his screen. It was small, only a few seconds long, and it sat at the bottom of the display like a footnote. Mira studied it. The line was not flat. It dipped once, rose, dipped again, and ended.

"What am I looking at?"

"The Drive," Pavel said. "Its last breath, before it went cold."

"You recorded it?"

"I always record it." He did not look at her. "The Drive does the same thing every time. We have the profiles from the trial runs, from the shakedown, from the Meridian transit. There is a signature. There is always a signature." He paused. "This one has something extra. A secondary pulse, low amplitude, about eleven hertz below the harmonic. I cannot account for it. I have tried."

Mira stared at the waveform. The secondary pulse was subtle enough that she might have missed it if Pavel had not pointed. It was not noise. Noise was random. This had shape.

"Did it happen on the way in?"

"It began two minutes before transition and ended the moment we dropped below light. It was, I think, the Drive talking to something. Or something talking back."

The bridge fell quiet. Somewhere aft, a ventilation fan cycled through its slowest rotation, and Mira could hear it for the first time since she had come aboard.

Yara spoke without turning from her screen. "Pavel, run that waveform against the drive logs from the last three transits. I want to know if we have seen this pulse before, or if this is the first time."

"Running."

Mira straightened. Her reflection ghosted across Pavel's display, faint and featureless. Sector 7-G waited beyond the viewport, a sheet of black that the running lights of the ship could not dent. She had read the briefing papers Idris Voss had sent before departure. She had read them twice. She had underlined passages in three colors, and the underlined passages had not answered the questions she carried into the dark.

The Vance Protocol had been Idris's idea. Mira had not been there when it began. She had been told, later, that it had begun as a response to a single signal received forty-seven milliseconds after a routine burst transmission somewhere beyond the Outer Colonies. The signal had been short. The signal had been deliberate. The signal had been the kind of thing that could be explained away, if one wanted to explain it away, and the kind of thing that could not, if one was honest.

Mira had chosen to be honest.

She had not told the crew that. She had told them the mission was a survey, that Sector 7-G was unmapped and possibly rich in volatiles, that Vance-One was the first ship capable of reaching it in a single transit, and that the Protocol existed to make sure they came home with the data intact. Those things were true. They were not the whole truth. The whole truth lived in a sealed file on her tablet, and she had not opened it since launch.

"Voss," she said now, keying the long-range channel. The signal would take eleven minutes to reach the relay at Callisto, and eleven minutes to come back if anyone was listening. "This is Vance-One. We have transitioned at the edge of Sector 7-G. Survey package is spinning up. I will have preliminary data within the hour. Standing by."

She released the key. The channel hummed. Pavel watched his waveform. Yara watched her numbers. Mira watched the empty chair against the aft bulkhead, and then she watched the viewport, and then she stopped watching anything in particular and simply waited.

The survey package began its sweep.

The survey package worked in silence, as it was designed to. Its collector arms deployed like the legs of some patient arachnid at the edge of the system, tasting photons and charged particles and the thin plasma she'd by the inner worlds, and rendering everything it touched into numbers that Pavel Soren could interpret with one eye and half his attention.

Pavel had been born on a station that orbited a gas dwarf in the Outer Colonies, raised by an engineer mother who had taught him to read instrument drift the way other children learned to read faces. He was not, by his own frequent admission, a particularly imaginative man. He was, however, an unusually precise one, and when his console chimed he did not announce what he had found so much as he confirmed what the instrument had already told him.

"Survey lock," he said, into the soft comm that connected him to the bridge. "Initial telemetry cached. Relaying to Dr. Hsu's console. Estimated time to full spectroscopic pass: nineteen minutes."

The wardroom was the smallest compartment on Vance-One. It was also the only one that smelled faintly of something other than recycled air and polymer, because Yara had begun, two weeks into the voyage, to brew a small quantity of something in a battered metal pot that she insisted was coffee and that no one else on board had the courage to identify. The smell of it hung in the room like a rumor, pleasant and slightly suspect.

Mira Quan stood at the head of the wardroom table with her hands clasped behind her back. She had not sat down. She was not certain she would sit down. The sealed file on her tablet felt heavier than its weight, though she had not touched it since launch.

Theron Beck arrived first, which was not unusual. He had taken to sleeping in a chair near the auxiliary airlock since the transition, as if the ship might need to be defended from the inside of an empty compartment. He settled into the corner seat with the careful economy of a man who had learned, in places he did not discuss, to take up as little space as possible. He nodded at Mira. Mira nodded back.

Yara Okonkwo entered next, sliding into the seat opposite Theron with the restless energy of someone who had been waiting for an excuse to leave her console. "If this is another instrumentation talk," she said, "tell me now so I can grieve in advance."

"It is not," Mira said.

"Excellent. I'll grieve optimistically, then."

Pavel came last, because Pavel always came last when a meeting was optional. He took the seat nearest the door, which he had quietly occupied on every prior occasion, and folded his long hands on the table as if preparing to receive a small, polite animal.

Sable Hsu was already there.

She had arrived before any of them. She had been there, in fact, when Mira had keyed open the wardroom hatch, sitting cross-legged on the narrow bench against the aft bulkhead with her tablet propped on one knee and her eyes moving across its surface with the rapid, ungenerous attention of someone cataloguing errors. She had looked up only long enough to acknowledge Mira's presence, and then had looked back down.

Sable was the youngest person on the crew by a margin that occasionally made the older members uncomfortable, though she had done nothing in particular to invite that discomfort except exist at her age with the credentials she carried. Her hair was cut brutally short, which gave her face the appearance of a blade presented handle-first. Her expression, when she bothered to have one, hovered somewhere between boredom and contempt, and she moved through the ship with the contained, feral economy of someone who had spent formative years in places where lingering was not safe.

She stood now, and the tablet came up with her, and the wardroom's small display obligingly mirrored its contents onto the bulkhead screen behind her.

"Right," she said. "Three rocks. No gas giants in this sector, no icy dwarfs worth the fuel to land on, nothing photogenic. Just rocks. And spectra. And me, talking about them, which is the part nobody enjoys."

She flicked a hand and the screen populated with three schematic shapes arranged in tidy concentric orbits around a small, anemic star that Sable had labeled, in the corner of the display, "the Motel 6 of main-sequence dwarfs" in a font she had clearly customized for the purpose.

"Star is a K-dwarf, about six-tenths the mass of Sol, older than it has any right to be. Metallicity low. Lifespan long, which is the only thing it has going for it. The system has been around long enough to do something interesting if it was going to. Let's see if it did."

She advanced the display. The first shape enlarged: a small, dense circle rendered in scorched oranges and the gray-white of silicate regolith.

"One. Catalog designation 7-G-1, which we are not keeping. Mass about point-three Earth, radius about point-seven. Tidally locked, no atmosphere worth discussing, surface temperature on the dayside high enough to soften lead. We are not landing there. Pavel, mark it anyway."

Pavel marked it.

"Two." She flicked again. The second shape grew. This one had color: deep blues at the poles, browns and ochres across the equator, a thin halo of atmosphere rendered in pale, careful strokes. "7-G-2. The interesting one, such as it is. Mass point-eight Earth, radius point-nine, rotation period thirty-one standard hours, obliquity eleven degrees, which means seasons, which means weather, which means complexity. Atmosphere is nitrogen-dominant with a thick CO2 component, surface pressure roughly one-point-two bars. Not breathable, but not punishing. Cloud cover averages sixty percent."

She paused. The pause was the particular silence of someone deciding how to phrase a thing they had already decided to say.

"Now. Spectra."

She advanced again. The display filled with line graphs and absorption bands, the kind of imagery that looked, to the uninitiated, like the negative of a barcode photographed through water.

"Atmospheric absorption in the two-to-fourteen micron range shows methane at four-point-seven parts per million, consistent with a non-equilibrium source. CO2 variance with altitude suggests active geological outgassing. Trace ethylene at point-three ppm. Trace phosphine at point-zero-zero-nine ppm, which is not nothing. And," she said, and her voice did something Mira had not heard it do before, which was slow down, "a complex of absorption features in the nine-to-ten micron window that is consistent, within the noise floor of our instrument, with the rotational signatures of certain aliphatic and aromatic hydrocarbons. The kind you get when amino acid precursors are cooking in a wet atmosphere under ultraviolet flux."

She looked around the table.

"That is the short version of pre-biotic chemistry. That is not life. That is not even close to life. That is the kitchen before the cook arrives. But it is a kitchen. In a sector we were told was empty. And I do not trust it."

Yara had been leaning forward. She straightened. "Why don't you trust it?"

Sable's mouth did something that, on a more cooperative face, would have been a smile.

"Because," she said, "I have spent my professional life being handed data that was too clean. Beautiful spectra. Beautiful numbers. Beautiful, plausible, wrong. I have learned to flinch at the sight of an absorption feature that resolves a little too neatly. This resolves a little too neatly. I want a second pass. I want a longer integration. I want to look at the line shapes by hand, not by the auto-fit the package gave us, because the auto-fit wanted to be helpful, and helpful is suspicious."

She advanced the display a third time. The third shape appeared, smaller than the second, larger than the first, rendered in muted blues and grays.

"Three. 7-G-3. Outer rock. Mass one-point-one Earth, radius one-point-oh-three, atmospheric retention marginal, surface temperature averaging two hundred forty kelvin. Likely captured body, or a migrant from further out. Subsurface volatiles inferred from the density profile and the orbital inclination. Less interesting than two, unless you are a geologist, in which case I am sorry for your dinner."

She tapped the tablet against her palm once.

"So. Three rocks. One of them has a kitchen. One of them is a cinder. One of them is a cold rock that might, if you squint, have water. That is the sector. That is the survey. Questions?"

The wardroom was quiet for a moment. Theron Beck, who had not spoken, was watching Sable with an expression Mira could not quite read, the expression of a man who had been lied to often enough to recognize the cadence of someone who was, very precisely, not lying.

Yara's hand was half-raised. Sable pointed at her without looking.

"The phosphine," Yara said. "Point-zero-zero-nine is low. What's the detection confidence?"

"Ninety-one percent on the package's number. Eighty-three on mine, because I do not like the third decimal."

"And the kitchen? What's your gut?"

Sable considered the question with the seriousness it deserved, which was, Mira suspected, slightly more seriousness than Sable usually granted anything.

"My gut," Sable said, "says the kitchen is real.

Mira held Sable's gaze for one beat longer than strictly necessary, then nodded once and looked around the wardroom.

"Good. The kitchen is the prize. If we are wrong about the kitchen, we are wrong about the sector and we may as well turn around and burn the fuel on the way home. So we are not going to be wrong. That is the standard."

She set the tablet flat on the table and folded her hands over it.

"Survey packages are pre-staged in the cargo bay. Twelve probes total. We launch in two waves. First wave is six atmospheric and surface characterization units for the second rock, the warm one. Second wave is six deep-penetration units for the outer rock, the cold one, and a single high-altitude atmospheric sampler for the kitchen itself. High-altitude only. We do not get closer than stable orbit without a specific authorization I do not yet have."

The captain's voice came from the doorway. Mira had not heard him enter, which meant either he was exceptionally quiet or she had been too deep in her briefing to notice, and she filed that fact away for later examination.

"Captain." She straightened slightly. "I was just walking the team through the package."

Captain Aldric Vael, late of the Martian Survey Service, now commanding a vessel that was not technically a survey vessel at all, regarded her with the mild, tired patience of a man who had been a captain long enough to know that walking the team through things was what commanding officers always said they had been doing.

"Walk faster, Commander. We have a window."

"Yes, sir. Theron." She turned. "You have the vector problem. What is your status."

Theron Beck had the look of a man who had been waiting for exactly this question, which he probably had. He also had a tablet of his own, its screen dense with the kind of orbital mathematics that made Mira's eyes ache if she looked at them for too long.

"First wave is clean," he said. "Six probes, standard insertion profiles, separation timing staggered to keep the radar picture legible from the surface in case anyone down there is watching. Two-plane coverage, sun-synchronous where I can get it, polar passes over the high-interest grid. Total delta-v cost sits inside the reserve I was given with margin to spare."

"And the kitchen."

"The kitchen is the problem." He turned the tablet so Mira could see the schematic, a delicate weave of blue lines around a small amber dot. "I can put a single atmospheric sampler into a high elliptical orbit, periapsis over the kitchen at four hundred kilometers, apoapsis just inside the heliopause of the inner moon's gravity well. That part is easy. Keeping it there for more than eight revolutions is not. The second moon's mass perturbs the line of apsides, and the kitchen's own atmosphere is thicker than the models assumed, so drag becomes a planning factor inside ten days."

"How much inside ten days."

"Eight revolutions at minimum. Five days, give or take, before the orbit decays enough to matter."

Mira was quiet for a moment. Five days was not nothing. Five days was, in fact, almost exactly the amount of time the mission planners had assumed the science team would need to characterize a target before any decision was made about closer approach.

"Get me seven," she said.

"I can get you seven if I can use the inner moon for a gravity assist on the way out. Which means I have to fly the insertion past the moon's bow shock at a very specific angle, and I have to do it on a trajectory the science team does not love because it puts the periapsis over the southern hemisphere of the kitchen rather than the mid-latitudes where they wanted their first look."

"Southern hemisphere versus mid-latitudes. Talk to me about the science hit."

Theron glanced, briefly, at Yara, who had been listening with the stillness Mira had come to recognize as her working posture.

"Hit is real," Yara said, answering before Mira asked. "Southern hemisphere has the thermal signature. Mid-latitudes have the chemistry. If I had to pick one, I would pick chemistry, but the thermal signature is the one that tells us whether the kitchen is a kitchen or just a rock with a smell."

"Then we pick the chemistry," Mira said. "Theron. Seven days. Make it happen."

"I will make it happen." He did not sound entirely certain, which Mira preferred to the alternative. Certainty, in her experience, was the first sign that someone had stopped checking their work.

"Who clears the launch."

Theron hesitated, and in that hesitation Mira saw several things at once, the shape of the chain of command on this particular vessel, which was not the chain of command printed on any of the documents anyone had signed, and the small precise architecture of who needed to approve what in order for a probe to leave a cargo bay on a ship that was, on paper, a private research vessel registered to a company that did not exist.

"Captain Vael clears the cargo bay door," Theron said carefully. "The mission director clears the profile."

"The mission director being."

A pause.

"Mr. Voss."

Mira inclined her head by a degree. She did not look toward the doorway. She did not need to. Idris Voss had a way of being present in a room that did not depend on whether he had been visible in it a moment before.

"Then I will leave you to it," she said. "Brief me when the profile is signed. Dismissed."

The wardroom emptied with the efficient small sounds of people collecting tablets and chairs being pushed back. Yara caught Mira's eye as she passed and gave her a single nod that meant something Mira did not have time to decode. Sable did not catch anyone's eye. Sable left like smoke, without transition.

Theron remained.

He remained because Theron always remained when there was a problem he had not yet finished solving, which was to say he always remained.

"I will need an hour with the profile," he said. "Maybe ninety minutes. And then I will need fifteen minutes with Mr. Voss, which will be the longest fifteen minutes of my week."

"Take the hour," Mira said. "Take the ninety minutes. Take whatever you need."

"Mira." He said her name the way he always said it, with the faint particular weight of someone who had been taught, somewhere along the way, to use names as a form of attention. "This is the part of the mission where, in the old days, I would have briefed the principal directly and not worried about whether the principal had a mission director standing between us and the launch authority."

"The principal being you."

"The principal being me, yes." He allowed himself a small, dry smile. "The principal being the person who drew up the original vectors for the Vance Protocol insertion burn, which is to say the person who knows what these probes are for and why the timing matters and what happens if we miss the window."

"And what does happen if we miss the window."

He considered the question, which was a courtesy, because he had already considered it.

"Then the inner moon's gravity well rotates out of phase with the kitchen's atmosphere, and the perturbation profile gets ugly, and we either get a shorter mission or a more expensive mission or both. And the principal will be unhappy. And when the principal is unhappy, everyone who cleared the profile hears about it."

"Then do not miss the window."

"I will not miss the window."

He left, and Mira was alone in the wardroom for a moment that lasted exactly as long as she allowed it to last.

---

The small room Theron had been assigned for working was not a room, by any reasonable definition. It was a converted storage bay near the aft airlock, with a single console bolted to the deck and a stool that had been bolted to the deck as an afterthought. The light was the color of old paper. The air tasted faintly of the resin that had been used to seal the deckplates, a taste Theron had stopped noticing approximately one month into the voyage and now noticed again only when he was tired.

He worked.

He worked the way he always worked when the work was precise, which was to say with a kind of slow, deliberate attention that looked, from the outside, like hesitation. He checked the numbers. He re-checked the numbers. He checked the numbers a third time because the numbers were the part he could control, and the parts he could not control were gathering, in his peripheral vision, like weather.

Idris Voss arrived without announcement, which was also how Idris Voss arrived at everything.

Theron did not look up.

"The profile is on the screen," he said.

Voss did not sit. There was nowhere to sit. Voss regarded this fact with the expression of a man who had once been comfortable in considerably finer accommodations and had not, in any meaningful sense, made peace with the change.

"Seven days at periapsis."

"Minimum. Realistic expectation is closer to seven-point-three, accounting for the second moon's rotation."

"And the insertion burn cost."

"Within budget. Not within comfort, but within budget."

Voss was quiet for a moment. The console hummed. Somewhere outside the converted storage bay, a pump cycled on and off with the metronomic patience of a thing that did not care about orbital mechanics.

"You could have briefed me earlier," Voss said.

"I am briefing you now."

"You could have briefed me when the parameters were first established."

"The parameters were not first established by me. They were first established by the package, which I read for the first time four days ago, at which point I began work."

"Theron."

Voss said his name the way old men say the names of younger men they have watched grow into something they did not entirely intend. There was a patience in it. There was also a weight.

"I know what you are asking," Theron said. "You are asking whether I trust the numbers. The answer is that I trust the numbers because I have checked them. You are also asking whether I trust the package. The answer to that is a different conversation, and it is a conversation I do not intend to have with you in this room."

Voss inclined his head by a degree, the same degree Mira had inclined hers, and Theron noticed the similarity and did not comment on it.

"Then we have nothing to discuss," Voss said.

"We have a launch to clear."

"You have my clearance, conditional on the captain's concurrence and the mission director's signature, both of which I understand are forthcoming."

"Both of which are you."

"Both of which are me," Voss agreed. There was, in his voice, the faint ghost of something that might have been humor in a man who still remembered what humor was for. "I will sign. You will launch. We will see what the kitchen has to say for itself."

Theron looked up, finally, and met Voss's eyes.

"Idris."

"Theron."

"This is the part where I remind you, as I have reminded you before, that if anything goes wrong with this insertion, the people who pay for it are not in this room."

"I know who pays."

"And you are certain."

"I am certain of the mathematics. I am certain of the team. I am not certain of the kitchen, which is why we are sending probes rather than people, which is the entire point of the exercise."

Theron held his gaze for a long moment, then nodded once.

"Then we are cleared."

"We are cleared."

Voss turned and left. Theron listened to the footsteps recede along the corridor, counted them out of old habit, and only when they had faded entirely did he allow himself to lean back on the bolted stool and close his eyes.

The kitchen was waiting.

The window was open.

And for the first time in longer than he wanted to think about, the principal who had drawn up the original vectors for the Vance Protocol insertion burn was, against every instinct he had left, going to let someone else light the candle.