CYCLE: Wranaui year. Roughly a quarter longer than an Earth-standard year.

D

DELTA-V: measure of the thrust per unit of mass in a spacecraft needed to perform a certain maneuver. In other words, the change in velocity that can be accomplished by expending the ship’s propellent. Maneuvers are measured in the delta-v required, and the costs add linearly. The mass of propellant required for any one maneuver is determined via the Tsiolkovsky rocket equation.

DEPARTMENT OF DEFENSE: civilian department of the League responsible for overseeing the UMC.

DERPs: dehydrated excretory recycling pellets. Sterile, polymer-coated feces as processed by appropriately equipped skinsuits.

DIRECTOR OF INTERSTELLAR SECURITY: highest civilian intelligence officer in the League. Primary responsibility is the existential protection of humanity.

DQAR: Wranaui battle formation, typified by an inverted delta shape.

E

EARTH CENTRAL: main League and UMC headquarters. Built around the base of the Honolulu beanstalk.

EIDOLON: planet in orbit around Epsilon Eridani. An Earth-like garden planet teeming with native life, none sentient and most either poisonous or hostile. The colony there has the highest mortality rate of any settled planet.

ENTROPIC PRINCIPIA: central text of Entropism. Originated as a statement of intent, later expanded to a philosophical treatise containing a summary of all known scientific knowledge, with primary emphasis on astronomy, physics, and mathematics. (See also Entropism.)

ENTROPISM: stateless, pseudo-religion driven by a belief in the heat death of the universe and a desire to escape or postpone said death. Founded by mathematician Jalal Sunyaev-Zel’dovich in the mid-twenty-first century. Entropists devote considerable resources to scientific research and have contributed—directly or indirectly—to numerous important discoveries. Open adherents are noted for their gradient robes. As an organization, Entropists have proven difficult to control, as they pledge loyalty to no one government, only to the rigors of their pursuit. Their technology consistently runs several decades ahead of the main of human society, if not more. “By our actions we increase the entropy of the Universe. By our entropy, we seek salvation from the coming dark.” (See also Nova Energium.)

ENUMERATION: broadcast of ascending numbers that Numenists are required to listen to as part of the observance of their faith. Some numbers, such as primes, are considered more auspicious than others. (See also Numenism.)

EUROPA COMMAND: League of Allied Worlds Europa Command (LAWEUCOM, shortened EUCOM) is one of seven unified combatant commands of the League military stationed within Sol. Headquartered on Lawrence Station with ongoing material support provided by the manufacturing facilities of Orsted Station by Ganymede.

EXOSKELETON: (EXO in common parlance) a powered frame used for combat, freight, mining, and mobility. Exos vary widely in design and function, with some being open to the elements and others hardened for vacuum or the depths of oceans. Armored exos are standard equipment for UMC combat troops.