Terra Expanse is a hard-science-fiction setting. Human technology in the 24th century is highly advanced, but it remains based on physical processes, engineering, manufactured materials, energy consumption, and infrastructure that can fail.
Technology may exceed present-day capabilities in efficiency, miniaturization, automation, medicine, materials science, computing, robotics, and spaceflight. It should not function like magic simply because it is futuristic.
Unless established lore explicitly says otherwise, ordinary human technology must remain compatible with known physical principles.
Human civilization is confined to the Solar System.
There is no faster-than-light travel, warp drive, hyperspace, jump drive, wormhole network, or routine interstellar travel. Other stars remain distant points of light rather than reachable destinations.
Travel between worlds takes time. Distance, acceleration, fuel, life support, orbital mechanics, and launch windows matter. A journey between planets is not equivalent to moving between nearby locations.
Communication is limited by the speed of light. Messages cannot cross the Solar System instantaneously.
Advanced technology still requires energy.
Reactors, batteries, capacitors, power grids, fuel systems, and other energy sources may be far more capable than modern equivalents, but they are not limitless. Equipment produces waste heat, consumes resources, requires maintenance, and can suffer overloads or failures.
There are no ordinary perpetual-motion devices, infinite-energy sources, or machines that generate large amounts of power without an identifiable source.
Power loss remains a serious problem aboard ships, habitats, mines, and remote settlements because life support, communications, temperature control, lighting, and industrial systems depend upon functioning infrastructure.
Matter cannot be created from nothing.
True matter replicators do not exist. A machine cannot convert energy directly into arbitrary food, tools, weapons, or other objects without raw material.
Automated fabrication is common and highly advanced. Industrial printers, machine shops, food processors, medical fabricators, and repair systems can manufacture complex products rapidly when supplied with appropriate feedstock, components, chemicals, or biological material.
A food printer or automated kitchen may process stored proteins, carbohydrates, fats, flavor compounds, cultured tissue, preserved ingredients, or other feedstock into meals. It does not create food from energy alone.
Likewise, a fabricator can produce replacement parts from stocked material but cannot manufacture unlimited equipment without resources.
Recycling is therefore economically and strategically important, especially in the Belt.
Human settlements outside naturally habitable environments depend upon engineered systems.
Air must be circulated and filtered. Water must be stored, purified, recycled, or extracted. Heat must be controlled. Waste must be processed. Food must be grown, manufactured from available biological resources, or imported.
Failures in these systems can become dangerous quickly.
Belter settlements are especially shaped by this reality. Equipment is repaired repeatedly, resources are conserved, and apparently mundane infrastructure may be essential to the survival of an entire community.
Sealed doors, pressure systems, emergency bulkheads, radiation protection, atmospheric sensors, water systems, and maintenance access are practical engineering features rather than decorative science-fiction scenery.
Computers, networks, autonomous systems, and artificial intelligence are highly advanced.
AI may control vehicles, assist with navigation, analyze large datasets, manage infrastructure, operate drones, support medical diagnosis, or interact naturally with humans. This does not make computer systems omniscient or infallible.
Software can contain errors. Networks can fail. Sensors can provide incomplete information. AI systems depend upon available data, hardware, permissions, communications, and power.
Security measures, access control, encryption, isolated networks, damaged hardware, and physical distance can all limit what a computer system can know or do.
Technology should not automatically provide perfect surveillance, perfect identification, or instant access to every database.
Sensors measure physical quantities or other phenomena they were designed to observe. A sensor may detect radiation, electromagnetic activity, acceleration, gravity, temperature, pressure, chemical composition, timing discrepancies, biological signals, or other measurable effects, but the measurement itself does not establish their underlying cause.
Software and AI may compare readings with known patterns, identify correlations, estimate probabilities, or apply classifications created by human researchers. Such conclusions remain limited by the available data and by the validity of the models behind them. A system cannot infer a physical mechanism that neither its data nor established scientific knowledge supports.
Sensor and surveillance networks commonly combine identity records, location data, environmental readings, and available biometric information to reconstruct events or identify unusual correlations. Such systems are useful for narrowing investigations, but their conclusions remain probabilistic. Unusual readings may coincide with a person's presence without revealing whether that person caused them, and vital signs alone provide little reliable information about motive or intent.
Augmented-reality systems, advanced displays, projection systems, wearable interfaces, and neural or cybernetic controls may be common where appropriate.
They remain information technologies rather than supernatural constructs.
A holographic or projected interface is a display method. It does not create solid matter, physical barriers, or objects that can be touched unless additional physical technology is explicitly involved.
Civilian AR glasses, tactical overlays, datapads, wearable computers, and similar devices can display information gathered from connected systems and sensors, but they cannot provide knowledge that the underlying systems do not possess.
Robots and drones are common tools throughout the Solar System.
They may perform maintenance, cargo handling, inspection, security, reconnaissance, mining, medical support, or military tasks. Their capabilities depend on their physical construction, sensors, software, communications, power supply, and assigned role.
A maintenance drone should not suddenly possess military-grade weapons or advanced forensic capabilities unless it was designed or modified for them.
Modified or experimental drones may carry unusual sensors or software, but their capabilities remain limited by what those components can physically measure and what their designers understand. Examining such a machine may reveal its construction, sensor types, calibration, recorded data, software behavior, or the patterns it was designed to search for. It does not automatically reveal the true nature or cause of whatever its designers intended it to investigate.
Likewise, autonomous systems should not be treated as universally intelligent humanoid machines. Specialized machines remain specialized.
Medicine, prosthetics, genetic treatment, cybernetics, and neural interfaces are substantially more advanced than present-day equivalents.
Severe injuries can often be treated more effectively, artificial organs and prosthetic systems may be highly capable, and long-term adaptation to different environments can be medically supported.
These technologies still have limits. Recovery takes time, treatment requires equipment and expertise, implants can fail, and biology cannot simply be rewritten without risk.
Cybernetic augmentation may improve specific functions but does not automatically make a person stronger, smarter, faster, or immune to injury unless the augmentation is specifically designed to do so.
Medical examinations can identify or exclude conditions within the limits of the available evidence and equipment. A normal scan establishes only that the examination found no relevant abnormality; it does not prove that unexplained symptoms had an external, technological, Resonant, or Inanis cause. Doctors should distinguish medical findings from speculation about events outside their field of observation.
Kinetic and ballistic weapons remain the standard form of personal and military weaponry.
Firearms, missiles, guided munitions, explosives, rail or coil systems, and other physically launched projectiles remain practical because they are reliable and effective.
Energy weapons may exist in specialized roles, but they are rare and should not replace conventional weapons without established lore supporting their use.
Weapons must still deal with ammunition, heat, power, recoil, targeting, maintenance, structural damage, and the dangers of using force inside ships and habitats.
Combat inside pressurized environments carries consequences. A missed shot may damage machinery, pressure systems, power lines, or civilians far beyond the immediate target.
Ground vehicles, aircraft, trains, elevators, maglev systems, pressurized transit, autonomous cargo systems, and similar technologies may be highly advanced, but they remain physical transportation systems.
Teleportation is not an established human technology.
People, cargo, and vehicles must physically travel from one place to another.
Short travel times within large settlements should reflect available infrastructure rather than unexplained instantaneous movement.