Editing Openai/691a2d9f-c044-8012-bccf-942bfce6334d (section)

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# Rendezvous and anchoring tech at comet level - Rosetta/Philae showed how hard it is to just land and stay attached. - We’d need robust methods to: - harpoon/anchor into low-gravity, volatile outgassing ice - maintain position despite “jets” changing rotation and local gravity.
# Long-life, autonomous ISRU systems - Machines that: - mine ice - melt, filter, separate - electrolyze water, liquefy gases - store cryogenic propellant - and run for decades with minimal maintenance in a nasty environment.
# Serious orbital infrastructure - You’d likely stage from high Earth orbit or Lagrange points. - Right now we’re barely at the “occasionally visit an asteroid” phase.
# Navigation + long-term ephemeris robustness - Outgassing can perturb comet orbits. - Your depot needs either: - station-keeping propulsion to correct the comet’s actual orbit vs predicted - or continuous tracking + updated rendezvous planning on the ship side.

All of this is multiple tech generations away, but not in the “violate physics” category. It’s “extreme engineering and reliability” territory.