Ryloth / Legends Ryloth , also known as Twi ' lek , and Twi ' lek Prime , was the harsh , rocky homeworld of the Twi ' leks , an Outer Rim Territories world located on the Corellian Run and forming one endpoint of the Death Wind Corridor . One side of the planet perpetually faced its sun and the other remained in darkness , a phenomenon known as tidal locking . The dayside was referred to as the Bright Lands and the night - side was known as the Nightlands . Description . Ryloth , the second planet in the Ryloth system , possessed a thin , but breathable atmosphere . The planet was orbited by five moons , which had subtle tidal effects on the planet ' s liquid core and underground springs . It had little or no surface water except for patches of water ice on the night side . It was a planet of extremes : dry , rocky landscapes of deserts , mountain ranges with mist - covered peaks , shadowy valleys , alternated with snowy wastes , joined by lush temperate bands which concentrated much of its population . Because of its unusual day - night rotation period , atmospheric conditions on Ryloth ' s surface were characterized by turbulent seasons and extremely high winds ( reaching 500 kilometers per hour ) scouring the surface and sculpting the landscape and unpredictable bursts of heat called heat storm s , which could reach 300 degrees Celsius . The more extreme heat storms sometimes moved across the terminator and reached miles underground , making caves near the surface temporarily uninhabitable , before eventually dying out on the night side . Along the terminator lay a thin habitable border , a twilight realm between the two extremes . Along this narrow strip were the series of caverns where some of the Twi ' leks decided to build their underground cities , blockaded with thick blast doors and portcullises to keep out the vicious monsters that prowled the Bright Lands , especially lyleks . The Floating Rock Gardens of Ryloth were a natural wonder and tourist attraction , well known throughout the Outer Rim , where strong winds blew among the tunnels , causing rocks to float gently through the air . Over the years the gardens became filled with rare and dazzling stones . Visitors were allowed to rearrange the stones to their liking , but were encouraged to seek meaning in the natural configurations . Kala ' uun was a permanent city located within the Lonely Five mountain range , boasting a large underground spaceport . Fauna . Ryloth had several native non - sentient species , most of which were fierce and predatory for survival on a planet with such a harsh environment . The lylek was easily the most dangerous predator native to Ryloth , with their hard shelled insectoid bodies and sharp limbs and extremely strong tentacles . They were one of only a few creatures able to withstand the extreme temperatures of the Bright Lands . The doashim was another fierce predator that inhabited the dark subterranean caverns of Ryloth . They were horned , red - eyed , sharp - clawed and fanged creatures reminiscent of demons from the lore of many different sentient species across the galaxy . The gutkurr were fast , two - legged creatures with hard - shelled carapaces with spines protruding from their backs . They were predatory creatures feared by the Twi ' leks . One of the few non - aggressive creatures of Ryloth was the rycrit , which were short - furred quadrupeds kept as herd animals by the Twi ' leks . They were raised for their hides , which could be used for clothing , and for their meat which was often used in rycrit stew . History . Ryloth was originally discovered by Old Republic explorers approximately 10 , 000 years before the onset of the Clone Wars and was one of the first worlds discovered in the Outer Rim . Located at one end of the Corellian Run , it was one of the few worlds of the galaxy further from the Galactic Core than Tatooine . Civilization on Ryloth at the time of its discovery was not particularly advanced . Twi ' leks integrated windmills and turbines to power their homes and industries carved out of the mountains . The cultivation of fungi and molds provided nourishment for the populace , as did the rearing of the domesticated herd animals rycrits for meat . Twi ' leks never developed space travel , but instead expanded throughout the galaxy by trading with the Republic , variously negotiating , charming , or seducing their way to the stars . Life of enslavement . The slave trade had been an everyday part of life on Ryloth for millennia and persisted long after its contact with the Republic sometime in 10 , 000 BBY . Dancing girls were especially prized , and as Twi ' lek communities were established throughout the Republic and elsewhere , they found numerous eager markets . The slaves were often sold by ' contract , ' as a feeble way of evading antislavery laws . Female Twi ' lek consorts and companions soon became a status symbol among the rich and the decadent throughout the Galactic Republic and eventually the Galactic Empire . The slave trade remained profitable all throughout Ryloth ' s history , and though the early slavers were Twi ' leks , over the years many alien crime lords migrated to Ryloth for a piece of the action . Twi ' leks of all professions eventually became a common , even ubiquitous , sight all over the galaxy , as businesspeople , servants , bodyguards , majordomos and slaves . Their near - Human appearance made them less a target of anti - alien prejudice than others during the Imperial era . The Anx crime lord Graxol Kelvyyn had his headquarters on Ryloth shortly before the onset of the Clone Wars . He was known for having a vast slave - trading network that covered the Outer Rim and even reached Kidiet Olgo in the Galactic Core . Prominent examples of Twi ' lek slaves during the last days of the Republic and the Empire included Ann Gella and Tann Gella , twins owned by Sebulba , and Oola , owned by Jabba the Hutt . Ryll . The major export of Ryloth , and the product which sustained its early trade , was the mineral known as ryll , a potent spice , discovered in 4800 BBY , which was mined and originally distributed for medicinal use . Ryll was found in ' blooms ' in the rock rather than veins , typical of most ores . Miners placed their mines underneath the blooms and drilled up . Ryll ' s highly addictive nature and hallucinogenic properties also made it a favorite recreational substance among the scoundrels and decadent nobles of the galaxy . A particularly popular and addictive mixture was glitteryll , a synthetic mixture of ryll and glitterstim which had a strong numbing effect on memory . Ryll and glitteryll were outlawed on most Republic worlds , but the demand was great enough to sustain a healthy black market . Crime lords and slavers turned their attention to ryll smuggling operations and began competing with legitimate miners . By the time of the Jedi Civil War , most " legitimate " ryll mining operations were gone , leaving only the smugglers . The exclusive distribution rights to ryll were temporarily seized by the Neimoidians around 4800 BBY . Though it was thought this might end the perilous illegal ryll trade , it had quite the opposite effect . Irresponsible distribution of the drug eventually led to the Gank Massacres . Jedi Knights on Ryloth . Around 1002 BBY , the Brotherhood of Darkness operated a Sith academy on the world that specialized in the training of Sith assassin s . In the years before the Clone Wars , Anoon Bondara served as Jedi Watchman of Ryloth , identifying Force - sensitive Twi ' leks and sending them to Coruscant for training . In 44 BBY , Jedi Master Tholme and Quinlan Vos were sent to Ryloth under orders to stop illegal animal smuggling . There they met a Force - sensitive infant Twi ' lek named Aayla Secura . She was taken and later trained by Quinlan Vos . Later in 32 BBY , Vos and Aayla , now his Padawan , discovered an illegal glitteryll smuggling operation masterminded by Pol Secura ( Aayla ' s uncle ) , Bib Fortuna , and Senator Chom Frey Kaa , using energy spider eggs taken from Kessel . Using the mental abilities of the Kiffar Asanté Vos and large doses of glitteryl , Pol Secura wiped their memories and kept Aayla as a dancer in his estate . Eventually , Vos recovered his memories and returned to Ryloth to retrieve his Padawan . Ryloth in the Republic . Ryloth entered into the Galactic Republic circa 10 , 000 BBY . Ryloth was represented in the Galactic Senate by Senators Connus Trell and Orn Free Taa , who succeeded the controversial Chom Frey Kaa . Senator Free Taa , a strong Loyalist , kept Ryloth under the Republic ' s protection by supporting most of Supreme Chancellor Palpatine ' s decrees , including the Military Creation Act . Clone Wars . During the Clone Wars , Ryloth was invaded by the Confederacy of Independent Systems and was used to house a large droid reclamation facility under the eye of Wat Tambor . At first the Republic Garrison , under the command of Jedi General Ima - Gun Di and Clone Capt . Keeli fought the droids alongside Twi ' lek freedom fighters under Gen . Cham Syndulla to protect the refugees . Unfortunately , supplies were running low and the droid army was closing in on their position . When a Republic fleet under Admiral Dao failed to make it past the Ryloth blockade , Gen . Di decided to sacrifice himself and his command to buy the Twi ' leks time to escape . Though Gen . Di and his command perished , supplies sent from Toydaria reached the refugees . After the droids took control of Ryloth , the Twi ' leks were taken captive and some were used as human shields for the droid army . The seizure was officially protested by Senator Orn Free Taa , and public opinion on Ryloth itself was bitterly divided . The battle was short , but Ryloth ' s towns were left heavily damaged by droid bombers . Eventually , the planet became the site of a battle in 19 BBY during the Outer Rim Sieges . Galactic Empire . The anti - alien prejudice of the Galactic Empire was clear to the inhabitants of Ryloth . Human High Culture thought little of aliens , but Ryloth shrewdly played the role of loyal servant to the Empire , while quietly and unobtrusively aiding the Rebel Alliance . These were dark times for the Twi ' leks , however , as even members of the most influential clans were enslaved , losing all their property and influence to entertain and see to the needs of Imperial bureaucrats and governors . For a time , roughly the same year as the Battle of Yavin , the Rebellion operated a base on Ryloth . It was located by Viper probe droids , prompting an attack by an Imperial task force , which infiltrated and wiped out the installation , despite strong resistance from the Rebels and even from immigrant Jawas . During this time , the Zann Consortium owned a secret Consortium palace on Ryloth . In 5 BBY Grand Moff Wilhuff Tarkin established a refueling outpost on Ryloth , using Twi ' lek slave labor , and recruited native Twi ' lek Tol Sivron to administer the outpost now called Maw Installation . In 3 ABY , Tyneir Renz , Padija Anjeri , Nikaede Celso , and Drake Paulsen brought the crystal skull of Twi ' lek Jedi Newar Forrth to the Rebel base on Derora . Renz presented the skull to the Nercathi clan on Ryloth to persuade them to join the Alliance . After the Empire . Following the Battle of Endor in 4 ABY , Ryloth became a member of the Alliance of Free Planets . However , after it was liberated from the Empire , Ryloth chose not to join the New Republic right away . Later , Wedge Antilles and Winter would journey to Ryloth in search of a fugitive Twi ' lek , and had to compete with a group of Imperials in a rigged race . After Rogue Squadron went to Ryloth in 6 ABY to get ryll to help heal the Krytos virus , Twi ' lek pilots joined Wedge Antilles and former pilots of Rogue Squadron in fighting Ysanne Isard in the Bacta War . Due to their ryll kor scams against the New Republic , the Shak clan was discredited . Shortly after that , the Twi ' lek Nolaa Tarkona engineered a revolution that overthrew the ruling clans . She then assumed control of Ryloth and founded the anti - Human Diversity Alliance . However , in 24 ABY , the Diversity Alliance ' s efforts to launch a war against Humans was foiled . Following that , the planet was represented in the New Republic Senate by Kur and later by Cola Quis . During the Yuuzhan Vong War , the planet was a valuable member of the New Republic and the subsequent Galactic Alliance . During the Second Imperial Civil War it was part of the Galactic Alliance Remnant . Behind the scenes . The PC game " " mistakenly places Ryloth in the Orus sector , which is actually a sector located in the Inner Rim . Additionally , " Rebellion " in - game encyclopedia entry for Ryloth erroneously states that most of the planet ' s inhabitants live in perpetual darkness on the side of the world that eternally faces away from its sun . Despite Ryloth ' s lack of rotation in earlier portrayals , the Ryloth story arc in the of " " instead shows day and night on the planet , as well as a mention of its " planetary rotation . " This was later confirmed as a retcon rather than an error in " The Essential Atlas " , although the planet was still mentioned to have harsh environmental conditions . The Twi ' lek cities built within caverns have been compared to real - life locations such as the people ruins of in south - western , which were discovered by two cowboys in 1888 .