Chapter Text
The bridge of the Curiosity hull made a long creak that rolled fore to aft and back like the ship was a wooden hull. The stabilizers chased it. You could feel the half-second they took to answer, a faint settle underfoot, then correction. Outside the forward viewer the protostar's accretion disk hung in bands of charged dust, copper and violet, lit from within where matter fell toward the dark knot at its center.
It was, by any reasonable standard, the worst place in four sectors to try to take a clean reading. Which was the entire point.
Cat was half-sitting on the edge of the science console, one boot hooked under the rail, watching the discrimination suite eat noise.
CAT: Channel nine's still clean. It shouldn't be clean. We're sitting in the loudest room in the quadrant and channel nine is… listen.
She tapped, and the raw feed played: a wall of hiss, electromagnetic surf. Tapped again, and the filtered version came through, a single tone, steady, almost prim.
CAT: It's finding the signal it wants and throwing away everything it doesn't, in real time, recalibrating against its own error every… Julian, every forty milliseconds. It's correcting faster than the disk can lie to it.
Julian stood at her shoulder, eyes on the feed, one hand half-raised and forgotten.
JULIAN: Show me the error term.
She brought it up. He watched the number: a jitter sitting low, breathing in a narrow band.
JULIAN: That's not drift. That's the system learning the room. Every false positive it rejects, it folds back into the baseline, so the next rejection costs it less…
He reached past her and pulled the long view, three days compressed, and the error term walked downhill across all of it, gentle and certain.
JULIAN: It got better the longer we sat here. We built a sensor that's bored by chaos. Cat, we could fly this into a nebula and read a man's pulse on the far side of it.
CAT: We should not do that. But we could.
At the engineering station Miles had the structural telemetry open, one thumb tracing the curve of the load graph.
MILES: We're not flying anything into anything. The integrity field's working harder than I'd like as it is. She's holding. But she's talking about it. Hear that?
The creak came again, on cue, fore to aft.
MILES: That's the dorsal spine flexing about two millimeters more than the spec wants, and the stabilizers walking it back. Normal, for this. Annoying, for this.
He finally glanced over.
MILES: I'll be glad to be somewhere the ship doesn't sound like my grandmother's stairs.
JULIAN: Two more days. The suite's earning every one of them.
MILES: The suite's earning them. The hull's paying for them. Different accounts.
But he said it to the graph, and there was a slow hum underneath it.
It was Torren who turned his head.
He was at navigation, hands light on the helm, holding them against a tidal gradient that wanted to slide them inward a few meters at a time. Then he stopped, and tilted his head.
TORREN: Did anyone else catch that?
CAT: Catch what?
Her eyes stayed on the error term.
TORREN: That wasn't the spine.
His hands had gone still on the console.
TORREN: The big one rolls, front to back, you can feel where it starts. That was… short. Up here.
He pointed, vaguely, at the overhead, at the deck above.
TORREN: Three of them. Close together. Like… like something knocking.
Velik, at the science station beside Cat, did not turn around.
VELIK: The dorsal members are under variable load. Short-period harmonics are an expected product of a structure flexing against an asymmetric field. The probability that you isolated a discrete acoustic event against that background is low.
TORREN: It wasn't the field.
VELIK: You have said that. You have not measured it.
Miles glanced at the structural telemetry, which was placid, and at the bulkhead, which was doing nothing, and went back to his load graph.
MILES: Torren. The whole ship is creaking. You're hearing creaking. Give the thing a minute and you'll hear it again, and it'll be the spine, and you'll have talked yourself into a ghost.
TORREN: I'm not saying it's a ghost.
He glanced at Velik, then at Miles, and said the next part anyway.
TORREN: I'm saying we're parked next to the most unstudied object in the sector, our sensors are reportedly so good they're bored, and nobody finds it strange that the one thing they're not picking up is a sound I can hear with my actual ears.
There was a small silence. Cat's mouth pulled to one side. Julian grinned.
JULIAN: Log it. Time, bearing, your best description. If it comes back, we'll have two points and a line.
TORREN: Aye, Captain.
He turned back to his vectors. A few seconds later Julian saw him reach up and adjust the gain on his own console's audio pickup, one notch, two, leaning a half-inch toward the overhead.
The bridge settled back into the long creak and the prim clean tone and the slow downhill walk of an error term that was learning to ignore everything it had been told to ignore.
Above them, on the deck Torren had pointed at, three short sounds came and went. The deck settled, and corrected, and nothing on the bridge changed.