Io is not Jupiter's largest moon. It is also the most volcanicly active world in the Solar System. So a strange place to build an outpost. If the story replaced the word "Io" with "Ganymede," it would lose nothing thematic or emotional and gain accuracy. Sorry to be Pedantic.
And since you brought it up, the story repeatedly refers to the time it takes to travel between Mars and Jupiter as three months, as if the distance between the planets were fixed and not constantly changing by huge amounts.
I thought that maybe the station isn't
on Io, that would be dumb, but in orbit
around Io. Specifically, if you were to place a station in one of the Jupiter-Io Lagrangian points, that would be quite clever. See, Io is the most volcanically active body in the solar system because of the magnetic flux around Jupiter
1. And if the future of humanity have somehow found a way to harness that magnetic energy to, say, power a space station, that would be awesome. And clever. Because it would cost close to zero fuel and energy to keep a station in a Lagrangian point.
The travel time also bothered me, but then I thought "What if they only send supplies when the trip is the shortest." Granted it's every few years, but when a trip takes 6 months anyway, that's a scale we can work with.
There was a time when I didn’t mind doing the solitary three month runs to Jupiter’s largest moon.
“The only thing more beautiful than Mars is the cold black of space. I actually miss the runs to Io, three months speeding through the void.”
And then there's Capital Station:
I agreed to take the run to Capital Station, which marked the halfway point between Mars and Jupiter.
That's incredibly problematic. I'm not sure for how much of that orbit it could maintain a halfway point between the planets, because the distance between the planets is either accelerating or decelerating constantly, and the space station would have to do likewise, which would be a gargantuan expenditure of energy.
Assuming that it could, why even build a station halfway between Mars and Jupiter? It would take a huge amount of energy to slow down to match orbits and dock and an equal amount of energy to accelerate away from it. I can't see any reason for a space station like that to exist in a dead zone of interplanetary space.
On the level of science fiction that the story is written in, it doesn't pass muster.
What if "halfway between Mars and Jupiter" is in the asteroid belt? It's more or less halfway between the orbits of Mars and Jupiter, and building a station near (or on) an asteroid makes a lot of sense. Protection from radiation, raw materials, less building effort, already stable orbit...
What bothered me more about the science part of the science fiction in this story was the fact that she's on a 14 week flight, and her engines are running the whole time.
Really? You're carrying enough fuel to accelerate for 3.5 weeks, flip around and decelerate for 3.5 weeks, while still having enough tonnage to carry supplies? If I were to design space freighters, they would be launched from as far away from a gravity well as feasible, they would be accelerated once at home base, probably by some version of a rail-gun, and they would utilize as many gravity assist flyby maneuvers as possible. Deceleration at the destination will once again be a combination of gravity assists and magnetic grapple-thingies. I'd waste as little tonnage as possible on fuel. Hell, if I have programmable cuddle-bots and psychologists, I'd also have robotic freighters, so no space wasted on living space and precious supplies for a human pilot.
But I really didn't want to go full-on pedant about this story.
I was actually curious about what people thought about the feels and prospects presented in this story, but being pedantic was more fun