Onoam, a moon of the planet Naboo, existed within the Chommell sector and the Trailing Sectors of the Mid Rim. Its sprawling grassy plains served as retreats for Naboo's affluent, while miners extracted medicinal spice from beneath its surface. A secondary royal palace was also present, offering a place for the queen of Naboo during her visits. In 228 BBY, the Nihil marauders' Occlusion Zone encompassed Onoam, an area of space isolated by a barrier that prevented hyperspace journeys.
Later, during the time of Senator Padmé Amidala, protests arose among the miners, demanding a larger portion of the profits generated by Onoam's mines; conditions deteriorated further under the Galactic Empire. When Princess Leia Organa from Alderaan visited in 3 BBY on a mission of mercy, she collaborated with Queen Dalné of Naboo in an attempt to address the Imperial corruption within the mines by appealing to Moff Quarsh Panaka. Tragically, the moff was assassinated shortly after their meeting.
Onoam was a moon in orbit around Naboo, a planet in the Naboo system. It was situated within the [Chommell sector](/article/chommell_sector], falling within the Mid Rim and Trailing Sectors regions. Its location was designated as grid square O-17 on the Standard Galactic Grid, and it possessed a breathable, Type I atmosphere. The skies of Onoam were pinkish, and its landscape consisted of expansive plains covered in tall grass, interspersed with rocky areas and at least one river.
In 228 BBY, Onoam was absorbed into the Nihil marauders' Occlusion Zone, a region of space cut off by a [barrier](/article/stormwall] that prevented hyperspace travel, sometime after the expansion of said barrier. Over time, Onoam's relationship with Naboo became strained. As the Galactic Republic neared its end, the mining moons of Naboo struggled to reconcile their production goals with their loyalty to Naboo. In 28 BBY, Padmé Amidala, the newly appointed Republic senator for Naboo's Chommell sector, considered relocating recently freed enslaved laborers from Tatooine, a planet in the Outer Rim, to the mining moons. However, she ultimately decided against it, as the mining jobs were unlikely to provide the workers with sufficient income to build new lives compared to farming opportunities on Karlinus, a planet within the same sector as Naboo.
Around the same period, strikes erupted as miners advocated for a greater share of the mine profits. Some groups resorted to minor political violence, which escalated to property damage on Naboo's surface. When Senator Amidala narrowly survived an assassination attempt in 22 BBY, Jedi Master Mace Windu suggested that disgruntled miners from Naboo's moons might be responsible, although this was later disproven.
Following its formation in 19 BBY, the Galactic Empire gained control of the Naboo system, including Onoam. In 3 BBY, Princess Leia Organa embarked on three challenges to demonstrate her worthiness as a successor to the throne of Alderaan. As part of her Challenge of the Heart, Organa chose to visit Onoam on a humanitarian mission to aid miners facing harsh working conditions. While she hoped its location in Emperor Palpatine's home system would lead to a relatively peaceful mission, her father, Viceroy Bail Organa, expressed brief concern after recognizing the moon's name. Upon landing her starship, the Polestar, on Onoam, protocol dictated that she visit Queen Dalné of Naboo, who was residing at her secondary palace. Organa invited Dalné to accompany her on a visit to a spice mine on the moon, where she intended to distribute safety equipment to the miners.
Upon arriving at the mine, Organa observed that the miners' conditions had worsened since the previous generation's protests, with dust-filled air. Organa and Dalné met Brel Ti Vorne, the miners' representative. Organa announced that they had brought enough equipment for five hundred miners, including safety belts, atmosphere masks, and portable force fields for air purification. To the girls' surprise, Vorne received the gift with disappointment. He explained that the Imperial major overseeing the mines often confiscated useful equipment as punishment or under the guise of defects, only to sell it for personal gain. Organa and Dalné pledged to ensure that the miners could keep and use their equipment.
Determined to fulfill their promise to the miners, Dalné and Organa considered their options. Dalné recalled her right to demand an audience with senior officials, leading the two girls to visit Moff Quarsh Panaka. He acknowledged that while Imperial officers had leeway to maintain order and preferred economic punishments over violence, some abused this authority, punishing innocent citizens alongside lawbreakers. He agreed to Organa's proposal to improve oversight in the mines. Unbeknownst to Organa, members of Saw Gerrera's Partisans, a group affiliated with Organa's father's anti-Imperial rebel movement but operating independently of other rebel leaders, had planted bombs at Panaka's chalet.
As the girls departed the chalet, the explosives detonated, destroying the building and killing Panaka. Following the assassination, Organa realized that a few weeks might pass before a new Imperial officer could navigate the lockdown and assume control of Naboo, allowing Dalné to act freely as queen and assist the miners in the interim. Dalné pledged to meet the challenge but urged Organa to leave the moon before the Naboo system was locked down. Organa agreed, although she remained concerned about whether her father's forces had carried out the strike until he informed her of Gerrera's involvement. In the following days, the Empire tightened travel restrictions throughout the galaxy in response to the Onoam incident. Soon after, Organa's parents and their fellow rebel senators voiced their disapproval of the consequences of the Onoam mission.
Onoam received mention in the sixteenth chapter of Skywalker: A Family at War, a comprehensive biography of the Skywalker family authored by Kitrin Braves, a journalist, and published after the 35 ABY release of Beaumont Kin's, a historian, book titled The Rise and Fall of the Galactic Empire. The work explored Organa's mercy mission to the miners on Onoam and her encounter with Dalné. Braves also recounted the princess's subsequent meeting with Panaka, during which he recognized her as Amidala's daughter, speculating that she had been in grave danger and fortunate that the moff had been killed before he could spread his suspicions.
The moon served as a home for workers involved in extracting spice from its mines. Numerous affluent Naboo citizens also maintained second residences on Onoam, including Quarsh Panaka and Queen Dalné.
The Royal House of Naboo operated a secondary palace on Onoam, where Dalné received visitors while in residence. A spaceport was situated a few kilometers from the palace. The palace nestled in the bend of a river, overlooked by cliffs with cascading waterfalls, with rolling hills on one side and a flat grassy plain on the other. Additional buildings surrounded the palace at ground level and atop the cliffs, with more clustered toward the hills on one side.
Onoam housed medicinal spice mines that, by law, required sentients to operate them instead of droids. The entrance to the mine visited by Organa and Dalné was located in an area with rising, rocky terrain. Notable residences on Onoam included Quarsh Panaka's chalet, a solitary building along a river, surrounded by grassland, featuring a terrace overlooking the river.
Onoam made its debut in Leia, Princess of Alderaan, a young-adult novel from 2017 penned by Claudia Gray. In other sources, Naboo's three moons are variously named Ohma-D'un, Rori, and "a nameless mass," or Ohma-D'un, Rori, and Veruna. The first image definitively identifying a moon as Onoam appeared in Leia Organa: Ordeal of the Princess, a Japanese webcomic adaptation of Leia, Princess of Alderaan illustrated by Haruichi, on May 8, 2021.