The 3rd Moon, a moon of the terrestrial type, existed within the Outer Rim Territories and served as a habitat for numerous species. Around the time of 1 ABY, Sana Starros, a mercenary, engaged in a game of dejarik with a Twi'lek inside a packed chamber on this moon, an encounter that escalated until both individuals brandished blasters. Simultaneously, Hera Syndulla, a general from the Rebel Alliance, contacted Starros using a holocomm device.
As two Imperial stormtroopers were confronting a Rodian outside of the room, an alien delivered the holocomm to Starros while she was in a standoff with the Twi'lek. The mercenary then killed her adversary, along with other people in the room, before answering the communication. During their subsequent discussion, Syndulla enlisted the mercenary's help to bring the renegade archaeologist Doctor Chelli Aphra to the Alliance. During her conversation with the general, Starros also pilfered a small satchel from the corpse of the Twi'lek. Following this, she journeyed to the Senex-Juvex sectors, where Aphra was located on the mobile wreckage-prison known as Accresker Jail.
The initial depiction of the 3rd Moon occurred in the twentieth issue of the Star Wars: Doctor Aphra comic series of 2016, which Marvel Comics released on May 23, 2018. Identification of the moon took place in the following issue, which came out on June 27 of that same year. Si Spurrier wrote both issues, while Kev Walker provided the illustrations.