…“Once you have super-conducting technology available in space, you can then create very strong magnetic fields and you can use them for various use cases,” he said. “You can accelerate things in space very fast or change the trajectory of a satellite completely without fuel.”…
“When we go to space, we get hurt by radiation, and these superconducting magnets can create umbrellas of magnetic fields around the spacecraft to protect the interior,” said Arshavsky. “So we can shield people in space from that radiation.”…
Though in all fairness that isn’t much of a problem for a superconductor - no resistance, no waste heat when power runs through it.
The main problem would be the waste heat from the rest of the system rather than the superconductor itself, so maintaining a superconductor cool is more a thermal insulation problem and the near vacuum of space actually helps in doing it because it removes the heat transmission from the hotter parts of the system to the superconductor via the environment (though, of course, it still happens via the solid parts in contact with it, so the thermal insulation is needed there)