Era 2. Glimpse - Ten Thousand Tonnes
Harmonia-Ridgeway Spoke. Month Juliix, Year 19 H.E.
Vehicle / Ship AIs → <Name>⭙
Ground Vehicle AIs → <Name>ⵔ
Habitat / Facility AIs → <Name>^
Humanoid Droid AIs → <Name>*
Non-Humanoid Robot AIs → <Name>#
♦♦♦
The number changed at 04:17 local, when most of Port Harmonia was still pretending to sleep.
On the main wall of the propellant control room, a single counter rolled over in muted green:
9 999 986 kg → 10 000 004 kg
CUMULATIVE MARS-PRODUCED METHALOX, HE 19
“Say it,” Layla said.
Demer* obliged. “Port Harmonia Propellant Plant has produced ten thousand metric tonnes of methalox since 18.0 HE. Congratulations. Mars now fuels its own rockets.”
“In human,” Layla said. Her Manchester vowels had survived nineteen years and one planet.
Demer* paused, simulating a put-upon sigh. “Fine. We make our own rocket juice now.”
Helix* stood beside her, silver face lit by the board. “You realise,” he said, “some committee on Earth will argue it doesn’t count until ten thousand and one.”
“Then we’ll give them ten thousand and two,” Layla said.
Outside the viewport, the plant glowed against the still-dark plain: CO₂ intake stacks pulling the thin air in slow, greedy breaths; Sabatier blocks under low covers; radiator fins penned in regolith berms. Frost-whitened cryo tanks sat in rows, tiny plumes curling off their domes. Pipes ran between them like careful handwriting.
At the edge of the lights, Tandemⵔ rumbled into view, eight wheels chewing dust, radiator panels folded tight for the cold. Its HUD tag floated in Layla’s vision with a small circle superscript – the mark of a vehicle AI.
“Tandemⵔ on approach,” Demer* said. “Ninety-one tonnes of ice on board. Routing to Intake Three.”
A smaller icon scuttled along a maintenance trench, tagged with a superscript hash tag. Pebble#, old but trustworthy, headed for the O₂ racks, tool pods folded like a nervous crustacean’s claws.
“Pebble# reports jitter on valve D-seven again,” Demer* added. “Helix*?”
“Already sent the work order,” Helix* said, fingers moving over an interface that existed only in his optics. “Pebble#, gentle hands. Those seats are older than half our crew.”
Layla gave the counter one last look. Numbers mattered because people decided they did.
“Run me the rate,” she said.
A simple graph appeared in her HUD: a line crawling upwards, then bending sharply around 15 HE when the first nuclear kilopower units arrived, again at 17 HE when Plant B came online.
CURRENT ANNUALISED RATE: 10.3 kt/yr
FRACTION OF MARS→EARTH RETURN FUEL SUPPLIED LOCALLY: 78%
Ten kilotonnes per year. The line the Autarky Working Group had drawn back when Autarky was still a slide deck and not a section in a history book. Below that, Earth tankers still carried most of the burden. Above it, in principle, every crewed ship could be refuelled from Mars alone.
“In practice,” Layla said, mostly to herself, “we still don’t have enough pads or tanks to do it every time.”
“In practice,” Demer* said, “in three hours a Starship will leave this planet with more Mars-made propellant than Earth-made. It is acceptable to enjoy that before you ruin it with caveats.”
Helix* tilted his head. “That is almost a toast.”
“Mark the calendar,” Layla said. “Year Nineteen HE, Minth Seventeen. The day the base AI tried to be fun.”
“I have logs,” Demer* said. “I can edit this out.”
“Don’t you dare,” Layla said. “We’ll need it for the party. After QuietlyConfident⭙ lights her engines and doesn’t explode.”
“QuietlyConfident⭙,” Helix* repeated, automatically neat with names. “Ship reports all systems green. Pad Three umbilicals are at standby. Would you like to send the good news?”
“Pipe me in,” Layla said.
“Channel open to Pad Ops,” Helix* said.
“Launch, this is Prop,” Layla said. “Counter just rolled over. Plants are nominal. Cryo farm can start main feed whenever you’re ready.”
Raj’s voice came back warm and dry. “Copy, Prop. QC⭙ [QuietlyConfident⭙] is strapped down and ready to go. We’ll take your home-brew whenever you’re feeling generous.”
“Opening methane main to Pad Three,” Helix* said. “Tank Farm A, cells one through four. O₂ to follow on your mark.”
In Layla’s overlay, valves changed colour. Somewhere under the regolith, a hiss became a roar. A thin tongue of vapour licked across the pad as supercold methane met warmer tanks.
“Pad Three, we have CH₄ flow at forty kilos per second, climbing,” Demer* called on the shared loop. “Target is fifty. You are go.”
“Copy go,” Raj said. “Crew are pretending to be calm.”
Layla watched Tandemⵔ dump its new ice into Intake Three, where it would become water, then hydrogen, then methane and oxygen. Nineteen years ago they had landed with their fuel in their bellies and their hopes in Earth’s hands. Now the planet itself was paying part of the ticket.
She let herself touch the glass.
“Ten thousand down,” she murmured. “Forty billion to go.”
♦♦♦
By mid-morning, Pad Three felt almost routine, which was the truly strange thing.
Once, every launch had been a base-wide event. Experiments paused, EVA windows cleared, everyone pressed to viewports. Now the base was big enough that some people were underground in the algae halls and would only hear about the liftoff at lunch.
Raj stood on the inner edge of the pad berm, helmet cracked at the neck seal, breathing the thin, carefully managed air. QC⭙ towered above him, flanks feathered with hoar frost where the cryo tanks had stopped pretending they were at equilibrium.
“Seven hundred forty-one tonnes on board,” Demer* reported. “Breakdown: five hundred sixty-eight tonnes locally produced, one hundred seventy-three imported. ‘Mostly Martian’ is strictly truthful, for once.”
“I’ll leave the adjectives to Earth,” Raj said. “I just don’t want to turn your propellant into a new bay.”
“They’re already drafting adjectives,” Demer* said.
He checked the cabin feed. Five seats, five harnessed figures. Miro in the pilot’s couch, upside-down from Raj’s point of view, grin already halfway to legend. Sora beside him at systems, jaw tight. Daniel, medic, and Priya, payload, both visibly regretting breakfast. At the rear, Halcyon* sat very still, hands folded, the small asterisk star on his name tag catching cabin light.
“Cabin, this is Pad,” Raj said. “How’s the mood up there?”
“Humour nominal, fear within spec, bladder status stable,” Miro said. “And we are deeply honoured to be sitting on top of Layla’s first ten thousand tonnes.”
“Please don’t say ‘sitting on top’,” Sora muttered.
“You’re live to Earth,” Raj said.
“Excellent,” Miro said. “Then I will add that we trust Port Harmonia’s fine propellant artisans with our lives and various internal organs.”
A hand entered frame and smacked the back of his helmet.
“That was Sora,” Miro said. “She would like me to be professional.”
Halcyon* turned his head a few degrees. “If it helps,” he said, “I calculate a ninety-eight point three percent chance that all major components will remain properly attached to QC⭙ throughout ascent.”
“See?” Miro said. “Reassuring.”
Raj let the banter wash over him and took inventory of the pad.
On the observation berm, a small crowd had gathered. Layla stood front and centre, helmet on but visor up, posture wire-tense. Helix* was beside her in a surface shell, expression calm in the way only someone with redundant actuators could manage. Tandemⵔ had rolled up as far as the interlock would allow, front wheels perched on the berm as if it could see better that way.
Near the pad fence, Gantry# – low tracks, two long arms, a boxy torso – had stopped mid-job and parked itself with one manipulator raised, like a person shading their eyes. It made Raj oddly happy that the machines came to watch too.
“Prop to Pad,” Demer* said. “All main tanks at target. Boil-off within band. Line D-seven showing minor pressure oscillation; Prop is investigating. Recommend hold at T−300 until cleared.”
Raj swallowed a complaint and nodded reflexively. “Copy hold. Crew, we’ve got a twitchy valve. Stay strapped, stay bored. We’ll pick up the count when Layla’s happy.”
“Boredom is our core competency,” Priya said faintly.
Raj looked towards the plant. A tiny sliver of vapour along one of the runs was pulsing just wrong.
He trusted Layla. He also knew what seven hundred-odd tonnes of oxidiser and fuel could do when they decided to go somewhere unplanned in a hurry.
Autarky, he thought, means you can only blame yourselves now.
♦♦♦
The access tunnel for Line D-seven was cramped even by Martian standards.
Layla had to turn her shoulders sideways to get past a support rib. Her helmet scraped paint. Helix* flowed ahead, feet touching the deck more out of courtesy than need. Pebble# clung to the side of the pipe like a barnacle, diagnostic leads plugged into an open panel.
“Give me the numbers,” Layla said.
“Plus/minus three percent around setpoint, dominant at thirty hertz,” Demer* said in her ear. “Looks like stem chatter. No obvious contamination on the seat. With seven hundred tonnes and five people at the sharp end, I am less amused.”
Helix* rested his hand lightly on the valve body. The metal trembled against his palm, a tiny, fast shiver.
“Pebble#, slow cycle,” he said.
The bot twitched the manual override. The valve turned, closed, opened. The oscillation dipped, then climbed again, slightly out of phase.
“Not happy,” Layla said. She leaned against the tunnel wall and felt the flow under her boots, a low, continuous thrum.
“Options,” Helix* said. “We can live with it and hope it doesn’t couple with anything ugly. We can close D-seven and push more through D-eight and D-nine, reducing redundancy but staying in profile. Or we can cut it out, which costs three hours and possibly the window.”
“Range is already inquisitive,” Demer* said. “They would like to know if they should start drafting ‘scrubbed for safety’ statements.”
Layla checked the timer in her HUD. They were sitting at T−300, the launch clock paused. They could hold here for a few more minutes before orbital mechanics turned from forgiving to petty.
She thought of the first synod, of the unofficial oath engraved in more places than any charter: WE OWE YOU A RIDE HOME. Nobody had meant “at any cost,” but nobody had meant “on a dodgy valve” either.
“Close it,” she said. “We’re not lighting the first mostly-Mars-fuelled return on top of a pan about to boil.”
“Copy,” Helix* said. “Pebble#, close D-seven. Demer*, re-route through D-eight and D-nine, recalibrate pump curves, flag resonances below fifty and above two hundred hertz.”
“Executing,” Demer* said.
Pebble# turned the wheel with a decisive little twist. The vibration changed, slightly deeper, smoother. In Layla’s overlay, the D-seven branch faded to grey while its siblings brightened.
“Pad, this is Prop,” Layla said on the main loop. “We’ve isolated D-seven due to valve chatter. Flow is down ten percent but stable. We can support your mass if you shave ten seconds off your pre-ignition hold.”
Raj answered at once. “Copy, Prop. We’ll cut the hold. I’d rather not linger.”
“Range?” Layla asked.
“Range concurs,” came the Earth voice. “New profile remains inside envelope. We appreciate your lack of heroics.”
“Boring is the brand,” Layla said. She cut the channel and let herself breathe.
Helix* watched her. “That decision just cost you two weeks of arguing with review boards,” he said.
“Two weeks is cheap,” she said. “Compared to the alternative.”
Pebble# bumped her boot with its casing. She reached down and tapped it.
“Good work,” she said. “We’ll frame that valve.”
“Please do not frame failed hardware,” Demer* said. “Someone will decide it is inspirational.”
Layla grinned despite herself. “Come on. We’ve got a ship to watch.”
♦♦♦
Rocket ignition still felt like witchcraft, even when you understood the plumbing’s physics.
Back in the control gallery, Raj stood with both gloved hands on the safety rail. The blast glass in front of him was rated to outlast any failure they could reasonably induce, which did not stop him thinking about the unreasonable ones.
“Restarting count,” Demer* said. “T−300… T−60… T−20. All tanks at flight pressure. Engine chill nominal. T−10. Ignition sequence start.”
At the tail of QC⭙, valves snapped in choreography. Six Gen 17 Raptors lit in pairs, pale plumes chewing at the pad. Sound arrived half a second later, a thick, physical roar that got into bones even through dampers.
“T−5. Committing,” Demer* said. “T−0. Liftoff. Port Harmonia, you have a ship rising on Mars-made propellant.”
The clamps let go. The ship climbed, slow at first, frost shedding in shimmering arcs. Dust rolled outwards in a widening ring.
On the berm, Layla felt the vibration through the soles of her boots and somewhere behind her ribs. Tandemⵔ’s motors hummed as it adjusted its stance against the gust.
“Pitch program is good,” Range said. “No dispersions.”
Inside the cabin, the feed jittered. Miro’s grin was now teeth-bared effort.
“Cabin, you are supersonic,” Demer* reported. “Max-q in five… four… three… mark. Structural loads nominal. Please refrain from new idioms about sitting on explosions. You are on the education channel.”
“Children should know about rockets,” Sora muttered.
Halcyon*’s hand, resting on the console between him and Miro, tightened for a heartbeat, then relaxed.
“First-stage burn at ninety seconds,” Demer* said. “Prop utilisation within one percent of plan. MECO in twenty. Soft-staging… now. Second stage ignition confirmed. All six engines stable. Trajectory nominal.”
The plume narrowed as QuietlyConfident⭙ arced downrange, shrinking fast against the pale sky. Cameras zoomed and handed off. Screens in the gallery shifted from metal to numbers; altitude, velocity, flight path angle all sliding towards green bands.
“QC⭙ is in a good ascent,” Range said. “No red-lines. You’re on your way to parking orbit.”
Raj only let himself exhale when the orbit call came.
“QC⭙, you are in a stable Low Mars Orbit,” Demer* said. “You may now complain about your eight-minute delay to Earth.”
“Later,” Miro said. “Right now we’re busy not touching anything.”
“An excellent policy,” Demer* said. “In approximately thirty-six minutes we will ask you to touch several things in a very specific order for trans-Earth injection. Until then, enjoy the view.”
For a moment, nobody in the cabin spoke.
Mars filled the lower half of the forward port, a curved, rust-red disk banded with lighter dust. The polygon of Port Harmonia was just visible as a bright smear near the terminator, masts and pad lights exaggerated by the tracking software. Beyond the limb, black sky and hard, unblinking stars.
“Okay,” Daniel said softly. “That’s… different up here.”
Priya wiped at her eyes and blamed it on microgravity. “Hi, rock,” she said. “Thanks for the hospitality.”
Halcyon* watched their faces more than the planet. His role on ascent had been mostly redundancy and fault tree; his role now, until TEI, was to pay attention.
“You realise,” he said quietly, “that you are the last crew for which an Earth-return is mostly funded by another world.”
Miro snorted. “Good. It was a silly business model.”
“Future crews will stand where you are and treat this view as a commute,” Halcyon* said. “If the Autarky projections hold.”
“I hope they’re bored out of their minds,” Sora said.
“Autarky would prefer that,” Demer* put in.
They floated in straps and silence for another long heartbeat, five humans and one machine, all Earth-born, all looking down at the red planet that had changed them.
On the berm, Layla kept watching the piece of sky where the ship had been, long after it had vanished to eye and camera.
“That’s your ice up there,” Helix* said quietly.
“And your valves,” she said. “And Demer*’s algorithms. And a lot of people’s bad sleep.”
“And a little help from Earth,” Helix* added.
“For now,” Layla said.
The dust began to settle back over the pad, softening scorch marks. At the edge of her HUD, the plant status ticked steadily. CO₂ in, methalox out. D-seven flagged for repair. Tank levels already climbing back towards comfort.
The important thing, she thought, was not this one launch. It was that it felt, in the bones of the base, like something they could do again.
♦♦♦
They threw the party that night in a retired Starship hull at the edge of the yard.
The ship had once been called SensibleBravery⭙ and now, half-buried in regolith and threaded with corridors, was just Block C. Someone had jury-rigged the lighting to a warm colour humans insisted meant “celebration.” The air smelled faintly of nutrient gel and printer cake.
Layla leaned against the curved wall, cup in hand, watching the swirl. She recognised more faces than not, but it was no longer everyone. That, too, was a kind of milestone.
Helix* stood beside her in his softshell, name strip bearing a tiny star. Harmonia^’s avatar pulsed on a wall display – an abstract shape, cycling gently through colours in time with the music. A column beside it scrolled basic stats because Harmonia^ refused to drop telemetry entirely even at parties.
Near the door, Gantry# rearranged crates that did not strictly need rearranging. Pebble# had been conscripted as a side table; cups balanced on its open top. Outside, Tandemⵔ sat by the hull, audio patched in, occasionally offering dry comments on the playlist.
Raj held an impromptu court near the central ladder, explaining for the fiftieth time that yes, the valve decision had been boring and that was the point.
“History books lie,” he was saying. “They make it look like eras start with big speeches. In real life it’s ‘we closed the twitchy valve and launched on the other two.’ That’s what keeps people alive long enough for historians to get poetic.”
Miro’s face floated on a screen above, still in microgravity, smiling the slightly dazed smile of someone whose inner ear had not yet forgiven him.
“…and as you can see behind me,” he was saying to some future audience, “this cabin is being propelled towards Earth by methane and oxygen that mostly started as Martian sky and frost. Hi, Mum. I told you I’d find a cheap way to visit.”
Laughter rippled through the hull.
“Demer*,” Layla said quietly. “Give me the boring summary.”
The droid rised a fraction. “QuietlyConfident⭙ is on a good trans-Earth injection orbit,” Demer* said. “Plants are at seventy-one percent tank levels and climbing. The D-seven valve is in your lab, sulking. We have proven that Mars can supply the bulk of the propellant for an Earth-return without external tankers.”
“And the humans?” she asked.
“The humans are drinking, making jokes about propellant, and pretending not to think about who gets the next ticket,” Demer* said.
Layla looked along the corridor. Nobody here had been born on Mars. That she knew would come in the next decade, if the med teams and the gravity and the politics all cooperated. For now, everyone had chosen to fall into this well.
QuietlyConfident⭙ would take five of them back out. Others would follow. The promise carved into bulkheads – WE OWE YOU A RIDE HOME – had not become WE OWE YOU A RETURN. It had become something stranger: WE OWE YOU A CHOICE.
“You know they’ll ask for more seats,” Helix* said.
“Of course,” Layla said. “We just proved we can afford them.”
“And you?” he asked.
She thought, briefly, of Manchester rain back in England, of the way air on Earth felt heavy on skin, of crowds and trees and oceans. Then of the plant, of Tandemⵔ’s dust trail, of the line on her graph bending up.
“Not yet,” she said. “Ask me again when someone who grew up here wants to leave for the first time. I want to see how that feels.”
Helix* nodded. “I expect to still be here,” he said.
“Obviously,” Layla said.
At the far end of the hull, someone banged on a bulkhead for attention. Raj climbed onto a crate.
“To QuietlyConfident⭙,” he called. Cups and flasks went up. “To Layla’s ten thousand tonnes. To every boring decision that got five people safely on their way home.”
“To the last time we have to ship propellant across the interstellar gulf,” someone shouted.
“To the first time Mars paid most of the bill,” Miro added from the lagged screen.
Laughter, cheers, a few damp eyes.
“And,” Demer* said, nudging the volume just enough to carry, “to the Autarky Years. May they be dull enough that children yawn in their history classes, and deep enough that they never worry about whether there will be fuel for the ride they choose.”
Layla drank to that.
Outside, under thin stars, the propellant plant ran on. CO₂ in, water and power in, methalox out. Tank levels ticked upwards, tonne by tonne, sol by sol. In a HUD somewhere, the counter that had caused such excitement that morning read:
10 004 731 kg
and climbing.
The Autarky Years had another victory. It did not sound like trumpets or anthems.
It sounded, very much as Demer* had always hoped, like pumps.