The Triluminary is a holy relic of the Minbari religious caste. The device was made from part of Sinclair's commlink, which was keyed to his DNA. after he had taken Babylon 4 into the past to assist the last great war with the Shadows. Because it is keyed to his DNA, the triluminary lights up when a descendant of Sinclair/Valen's bloodline is near it. When Sinclair was taken prisoner during the Earth/Minbari War, his captors attempted to question him using the Triluminary. The fact that it glowed proved to some of the members of the Grey Council that the legend that Valen was half human was in fact true, thus the fact that Valen had descendents who numbered in the tens of thousands meant that the Minbari population were now considered "impure." In order to prevent the Civil War that would have surely erupted on Minbari if the knowledge came out, and in order to prevent Delen from finding out that she was a descendent of Valen, the members of the Grey Council created the fiction that Minbari souls were being reborn into Humans which required an immediate end of the war.
Ancient type of melee weapon frequently used by Minbari warriors and - most prominently during the series - by Marcus Cole, a Ranger stationed on Babylon 5. When inactive, a Fighting Pike resembles a metal tube or cylinder of about 15 by 5 centimetres and is easily concealable. When activated by a sharp, shaking motion, it rapidly extends into a lightweight quarterstaff of about 1.8 metres, issuing a distinctive metallic sliding/clicking sound when its segments telescope and lock in place.
The Shadow Death Cloud is a type of planet killer used by the Shadows. As opposed to the Vorlon's planet killer being a ship, which shoots a lightning-like beam weapon to destroy a planet, the Shadow Death Cloud instead is an interconnecting lattice-work surrounded by untold trillions of nanites that form a cloud around the lattices, which can envelop a planet. The lattices contain tens of thousands of thermonuclear missiles that it launches toward the planet. The missiles then bore under the planet's surface, detonating deep underground. The resulting explosions cause violent tectonic upheavals, killing all sentient life on the planet. The nanites then go to work until the planet is rendered completely sterile, unable to support even bacterial life, and stripped of any resources of value. These resources are then converted to support the Death Cloud, allowing it to recharge its power, and build any missiles or other resources used up in the attack on the planet. When the nanites surround the lattices, they have the effect of absorbing any and all attempts to scan inside the cloud, akin to a form of stealth technology. They also have the effect of cooling the surrounding space to near absolute zero, which renders any other technology caught within the "cloud", such as ships' engines and power systems, to slowly shut down because of the extreme cold. Towards the end of the last Shadow War, the Shadows used at least one Death Cloud to attack any planetary populations that had allied with the Vorlons. Instead of using any sort of jump technology, the Death Cloud works much like other Shadow Vessels in that it phases in and out of hyperspace to go from one planetary target to the next.
In addition, the Drakh possessed one Death Cloud, using it in an attack against Earth as revenge for forcing their former masters, the Shadows, to leave the galaxy. The resulting attack was foiled by EarthForce and the Interstellar Alliance's new Victory-class battleships, but not before the loss of one of the Victory-class ships, and the infection of Earth with the Drakh plague.
Babylon 5 station personnel use a short range Communication Link (typically referred to simply as a "link") to communicate with each other's within the station. They also have a tracking beacon built in. The links attach to the back of one's hand. The links are bio-coded and designed so they can not be used by anyone except their owner. In the Season Five episode Objects in Motion, however, an assassin kills a security guard, steals his link, and manages to bypass the coding and listen in to security communication.
In that same episode Security Chief Zack Allan finds the link the assassin switched for the guard's link sticking to the inside of a metal box. Chief Medical Officer Stephen Franklin remarks that (the link shouldn't be sticking because) "Links don't use adhesive. It's a molecular bonding material genetically coded to the owner".
In reality, of course, the links had to be glued or taped to the actor's hands. In the cast commentary for the Season 2 episode The Geometry of Shadows the actor who plays Michael Garibaldi complains that having the link glued on and then removed ripped the hair off his hand. The actress who plays Susan Ivanova replies that she used double-sided tape to stick her link to her hand instead of glue.
Ruling body of the Minbari Federation as created by Valen during the Shadow War one thousand years before the events of Babylon 5. Comprising nine members, three from each of the Minbari's three castes (Worker, Warrior, religious). Among Minbari therefore also known as 'The Nine'.
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The Centarum seems to be the equivalent of the British House of Lords as the Centari society seems to be based on the equivalent of ruling caste of Nobels this is a reliable deduction from how the series talks about the Centarum
Bureau 13 was a secret organization operating in Earthgov. They were mentioned in the episode S02E06 "A Spider in the Web". After hearing of a role playing game with the same name J. Michael Straczynski promised never to use that name again.
Home of the 'Walkers', a species of First Ones who were consummate explorers. Cmdr. Ivanova persuaded them to fight in the last battle of the Shadow War by playing on what seemed to be an old rivalry between the Walkers and the Vorlons.
An honor duel to the death between two members of the Centauri duelling society known as Couro Prido ('proud knives' in the Centauri language). The winner of the Morago is honor-bound to accept the family of the loser into his own and care for them as if they were his own blood.
The G'Quan Eth is a flowering plant burned as a ceremonial incense by the Narn people during the ritual which ends "The Days of G'Quan"; the flower being the very symbol of the G'Quan faith. The plant is described as being difficult to grow, expensive to transport (and even to own), but is nonetheless vital to the Narn ceremony. When the seeds of the plant are mixed with the right ratio of alcohol it allows "whole new universes [to] open up" because of its narcotic properties (although the Narn seem to look distastefully upon those who use the plant for such purposes). Although never seen on-camera, the plant serves as the plot-point of a sub-plot in the episode "By Any Means Necessary" in which Ambassador G'Kar must find a replacement for his upcoming ceremony after the original shipment is destroyed in a cargo docking accident. G'Kar's search leads him to Londo Mollari, who, having the only viable plant obtainable before it is too late for the ceremony, demands an exorbitant amount of money for it only to reveal to G'Kar that he has no intention of selling it and was only dangling the G'Quan Eth before him so as to vex him as vengeance for the Narn invasion of Ragesh 3, where his nephew was imprisoned and abused. G'Kar is finally able to obtain the flower after bringing the affair to the attention of Captain Sinclair, who informs Mollari that because of the flower's chemical properties it is considered a controlled substance by Earth law (with the exception of use in medical or religious practices), Sinclair must confiscate it. Mollari, however, willingly surrenders the flower to the Captain as he believes (like G'Kar) that it is too late for the ceremony. Sinclair, however, provides a loophole for G'Kar's ceremony; the ritual must be performed when the sunlight touches the G'Quan mountains—however, because sunlight also travels through space, the sunlight that touched down on the G'Quan mountains 10 years ago is still 12 hours away from reaching Babylon 5, and as the ritual pre-date's Narn space travel, G'Kar is allowed to use that traveling sunlight to complete his ritual after the Captain turns the G'Quan Eth over to him.