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

==== 1. Pick a periodic comet that comes reasonably close to Earth (or at least to the inner solar system) on a predictable orbit. ====
# During a convenient pass, send up an expedition that: - matches velocity with the comet - lands / anchors a station on or around it - installs: - power systems (solar, RTGs, maybe future fusion) - ISRU gear to process ices into fuel (H₂/O₂, methane, etc.) - comms + navigation beacons
# From that point on, the comet becomes a mobile fuel/power bank that: - charges itself over years between perihelia - stores propellant and/or batteries
# A generational ship (or long-range convoy) chooses its outbound trajectory so that: - it can rendezvous with that comet on one or more future passes - it uses the comet station to refuel, recharge, or take on extra reaction mass.

So the comet is basically a scheduled, moving truck stop on a known ephemeris.