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The hardware and systems required to reliably live, work, and travel between planets within a single star system. This includes robust life support (closed-loop air/water recyclers), radiation shielding, in-situ resource utilization (ISRU) gear to make fuel and building materials from Martian soil or asteroid ice, and efficient propulsion like ion drives or nuclear thermal rockets. It's the practical, nuts-and-bolts tech that turns science fiction into a logistical reality, focusing on survival and sustainability in brutally hostile environments.
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