Spacecraft Stuff
Spoiler
Acceleration
The rate at which an object changes its velocity. An initially stationary object which accelerates at 9.81 m/s^2 (1G) will, after accelerating for two seconds, be moving at 19.62 m/s.
Delta V Capacity
A spacecraft's ability to change its speed. A spacecraft with a delta V of 5 km/s can start at rest (relative to... something) and end at 5 km/s with its propellant depleted. Alternately it can start at rest, accelerate to 2 km/s, slow back down to zero and have 1 km/s to spare.
Exhaust Velocity
Velocity of an engine's exhaust relative to the vehicle. A higher exhaust velocity yields a higher delta V capacity.
Propellant
Mass which is thrown in one direction by a rocket propelled vehicle, thereby accelerating the vehicle in the opposite direction via reaction force. All closed system space propulsion systems require propellant.
Mass Ratio
Number denoting the fraction of a ship's total mass devoted to propellant. A mass ratio of 2 indicates that a ship is half propellant and half everything else while 3 indicates 66% propellant and 33% everything else. Most spacecraft have a mass ratio of 2 or more unless they rely on magnetic sails.
Reaction Control System (RCS)
Small thrusters used to adjust a ship's orientation and make very small velocity changes. Normally they are chemically fueled. Many space platforms do not allow any form of propulsion system aside from RCS thrusters to be active while docking.
Open System Propulsion
Propulsion system which depends on the environment or external hardware to work. Examples include magnetic sails, beam propulsion, air-breathing turbines and car engines.
Magnetic Sail
Open propulsion system which generates thrust by deflecting solar wind. It can also work with a planetary magnetic field. Requires a significant amount of power and produces low thrust, though it does not require propellant, making it one of the most economical options for interstellar travel.
The rate at which an object changes its velocity. An initially stationary object which accelerates at 9.81 m/s^2 (1G) will, after accelerating for two seconds, be moving at 19.62 m/s.
Delta V Capacity
A spacecraft's ability to change its speed. A spacecraft with a delta V of 5 km/s can start at rest (relative to... something) and end at 5 km/s with its propellant depleted. Alternately it can start at rest, accelerate to 2 km/s, slow back down to zero and have 1 km/s to spare.
Exhaust Velocity
Velocity of an engine's exhaust relative to the vehicle. A higher exhaust velocity yields a higher delta V capacity.
Propellant
Mass which is thrown in one direction by a rocket propelled vehicle, thereby accelerating the vehicle in the opposite direction via reaction force. All closed system space propulsion systems require propellant.
Mass Ratio
Number denoting the fraction of a ship's total mass devoted to propellant. A mass ratio of 2 indicates that a ship is half propellant and half everything else while 3 indicates 66% propellant and 33% everything else. Most spacecraft have a mass ratio of 2 or more unless they rely on magnetic sails.
Reaction Control System (RCS)
Small thrusters used to adjust a ship's orientation and make very small velocity changes. Normally they are chemically fueled. Many space platforms do not allow any form of propulsion system aside from RCS thrusters to be active while docking.
Open System Propulsion
Propulsion system which depends on the environment or external hardware to work. Examples include magnetic sails, beam propulsion, air-breathing turbines and car engines.
Magnetic Sail
Open propulsion system which generates thrust by deflecting solar wind. It can also work with a planetary magnetic field. Requires a significant amount of power and produces low thrust, though it does not require propellant, making it one of the most economical options for interstellar travel.
Teslanium and Effects
Spoiler
Teslanium (Exmat)
Exotic matter which can be used to create mass projections, force projections and spatial conduits. Very harmful if inhaled or ingested, though under certain (unknown) circumstances this may result in telekinetic abilities. Teslanium generates positrons when in use, creating a potentially dangerous static charge until discharged.
Mass Projection
A massless energy field capable of displacing matter similarly to ordinary mass. Any force applied will be transferred to the teslanium used to create it. Used to make shields.
Force Projection
A directional gravity-like force field generated by teslanium. Can only be used for a short time before a positive charge accumulates to dangerous levels.
Spatial Conduit
Shortcut through space/time permitting instantaneous travel of objects and energy from one location to another. Can be generated by teslanium.
Faster than Light Travel
Application of a spatial conduit to cover a very large distance in seconds. Usually requires hours of acceleration by a high thrust fusion rocket or days with a magnetic sail followed by the same amount of time to slow back down in the target system.
Telekinesis
Set of abilities possessed by a small percentage of people who were exposed to teslanium dust at a young age (most people die horribly instead). Abilities consist of specialized applications of mass projections, force projections and/or spatial conduits, sometimes using two or three in unique combinations. Certain cybernetic implants can enhance these abilities.
Teslanium (Exmat)
Exotic matter which can be used to create mass projections, force projections and spatial conduits. Very harmful if inhaled or ingested, though under certain (unknown) circumstances this may result in telekinetic abilities. Teslanium generates positrons when in use, creating a potentially dangerous static charge until discharged.
Mass Projection
A massless energy field capable of displacing matter similarly to ordinary mass. Any force applied will be transferred to the teslanium used to create it. Used to make shields.
Force Projection
A directional gravity-like force field generated by teslanium. Can only be used for a short time before a positive charge accumulates to dangerous levels.
Spatial Conduit
Shortcut through space/time permitting instantaneous travel of objects and energy from one location to another. Can be generated by teslanium.
Faster than Light Travel
Application of a spatial conduit to cover a very large distance in seconds. Usually requires hours of acceleration by a high thrust fusion rocket or days with a magnetic sail followed by the same amount of time to slow back down in the target system.
Telekinesis
Set of abilities possessed by a small percentage of people who were exposed to teslanium dust at a young age (most people die horribly instead). Abilities consist of specialized applications of mass projections, force projections and/or spatial conduits, sometimes using two or three in unique combinations. Certain cybernetic implants can enhance these abilities.
Technology
Spoiler
Arc Sword
Advanced melee weapon which uses a mass projection to create a blade capable of cutting through most materials. Often includes a force projection designed to redirect incoming projectiles to their source. The weapon is very dangerous to the operator without extensive training.
Projection Barrier (Shield)
Mass projection designed to defend against hostile weapons. Will only partially resist slow moving objects but will generally obliterate high velocity objects. Ground based barriers are typically limited by the power supply and capacitor while space barriers are limited by how often the spacecraft is able to discharge its shields.
Strategic Barrier
Very large projection barrier used to defend an entire army or a city. Often powered by a fusion reactor. Strategic barriers can withstand sustained bombardment indefinitely as long as they are continuously powered. The only two ways through a strategic barrier are with a ground assault (usually requiring their own strategic barrier to get close enough) and a projectile at sufficient velocity. The latter option is normally not practical.
Artificial Gravity
Simulation of gravity aboard a spacecraft. Can be accomplished by a rotating habitat, acceleration or by mobilizing a planet. Force projections can alter gravity for a limited time before the charge becomes a hazard, making them impractical. There is no other method.
Gene Therapy
Retrovirus modified to deliver additional DNA, sometimes artificially manufactured. This can make a variety of changes in the patient, from cosmetic to upgrades to complete additions. Relatively minor changes, such as improved microgravity endurance or respiratory efficiency, generally require a month or two to take effect. More drastic changes can sometimes require up to a year. Extreme changes, such as additional limbs and anything that requires modifications to the skeleton generally do not work at all unless administered in utero, inherited or supplemented by surgery.
Advanced melee weapon which uses a mass projection to create a blade capable of cutting through most materials. Often includes a force projection designed to redirect incoming projectiles to their source. The weapon is very dangerous to the operator without extensive training.
Projection Barrier (Shield)
Mass projection designed to defend against hostile weapons. Will only partially resist slow moving objects but will generally obliterate high velocity objects. Ground based barriers are typically limited by the power supply and capacitor while space barriers are limited by how often the spacecraft is able to discharge its shields.
Strategic Barrier
Very large projection barrier used to defend an entire army or a city. Often powered by a fusion reactor. Strategic barriers can withstand sustained bombardment indefinitely as long as they are continuously powered. The only two ways through a strategic barrier are with a ground assault (usually requiring their own strategic barrier to get close enough) and a projectile at sufficient velocity. The latter option is normally not practical.
Artificial Gravity
Simulation of gravity aboard a spacecraft. Can be accomplished by a rotating habitat, acceleration or by mobilizing a planet. Force projections can alter gravity for a limited time before the charge becomes a hazard, making them impractical. There is no other method.
Gene Therapy
Retrovirus modified to deliver additional DNA, sometimes artificially manufactured. This can make a variety of changes in the patient, from cosmetic to upgrades to complete additions. Relatively minor changes, such as improved microgravity endurance or respiratory efficiency, generally require a month or two to take effect. More drastic changes can sometimes require up to a year. Extreme changes, such as additional limbs and anything that requires modifications to the skeleton generally do not work at all unless administered in utero, inherited or supplemented by surgery.
History
Spoiler
The current year is 2127 by the Terran calendar. Note that actual time elapsed may vary by location due to relativistic effects.
Eugenics Plague
Set of artificial viruses accidentally created by gene therapy labs on Earth in 2035. Everyone who was infected by the plague, whether they lived or not, also had a gene mod delivered. It is estimated that 35% of the current human population inherited gene mods as a direct result of this event.
Galactic Republic
Interstellar democratic government which formerly consisted of most known spacefaring societies. After being in decline for decades the government was officially disbanded in 2115. While the former members have all moved on to their own alliances many standards of the Republic were left intact.
Terran First Contact
First contact between Terrans and an alien species occurred in a colony in Alpha Centauri in 2083 when an alien survey probe located a newly established Terran colony. The Terran Alliance soon joined the Republic, though by then it was already in decline. However, the Terrans still enjoyed significant technological advancements based on the Republic's standards.
Sentinels
The Sentinels were once an elite group of agents assembled by the Republic. They specialize in powerful kinetic abilities coupled with significant cybernetic enhancements, granting them the reflexes to use arc swords to redirect bullets. A few agents of this organization still survive, some of whom are not willing to accept the collapse of the Republic.
Eugenics Plague
Set of artificial viruses accidentally created by gene therapy labs on Earth in 2035. Everyone who was infected by the plague, whether they lived or not, also had a gene mod delivered. It is estimated that 35% of the current human population inherited gene mods as a direct result of this event.
Galactic Republic
Interstellar democratic government which formerly consisted of most known spacefaring societies. After being in decline for decades the government was officially disbanded in 2115. While the former members have all moved on to their own alliances many standards of the Republic were left intact.
Terran First Contact
First contact between Terrans and an alien species occurred in a colony in Alpha Centauri in 2083 when an alien survey probe located a newly established Terran colony. The Terran Alliance soon joined the Republic, though by then it was already in decline. However, the Terrans still enjoyed significant technological advancements based on the Republic's standards.
Sentinels
The Sentinels were once an elite group of agents assembled by the Republic. They specialize in powerful kinetic abilities coupled with significant cybernetic enhancements, granting them the reflexes to use arc swords to redirect bullets. A few agents of this organization still survive, some of whom are not willing to accept the collapse of the Republic.


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