Ecologically, the world was a terrestrial mix of tundras, mountains, grasslands and deserts. Its days lasted 26 standard hours, and its orbit took 456 local days.
The reputation that had developed over the centuries was that the complete knowledge of the galaxy had been gathered within the computers of Obroa-skai's information repositories. Obroa-skai was also home to a large collection of Jedi-related antiquities which were destroyed by the Imperial Security Bureau.
In 16,782 BBY, the Celebratus Archive was founded on Obroa-skai with the goal of collecting the complete data records of over 300,000 species, providing a boon to scholars and ensuring the planet's reputation as a library world. A Jedi training academy was also founded on the planet no later than 990 BBY, specializing in data collection and analysis.
By 4 ABY, Obroa-skai had become an Imperial fortress world. However, it was abandoned by the Empire during the following year, and by 7 ABY, it was considered to be a stronghold of the New Republic.
The Obroans kept their planet neutral during the Galactic Civil War, despite heavy petitioning by the New Republic in 9 ABY. Obroa-skai's expansive library of galactic information and numerous academic institutions drew Grand Admiral Thrawn to raid its central computer system. The data acquired gave Thrawn the hidden location of Wayland, while the raid also served as part of a distraction technique used on the New Republic forces prior to the Battle of Sluis Van.
Obroa-skai was captured by the Yuuzhan Vong during their invasion of the Galaxy, and a yammosk was installed in the planet's mantle. Much was lost from the archives, but hardcopies of key items were saved before the assault. The Yuuzhan Vong kept many of the copies intact, at least until they could fully translate them. As such, much of the planet's buildings were kept intact, despite heavy Vongforming on other areas of the world. Obroa-skai was later liberated from the Vong, and the yammosk was destroyed.
Behind the scenes
Mistakes and inconsistencies
The planet's name is repeatedly misspelled as "Obra-skai" in Before the Storm. Star Wars: Rebellion: Prima's Official Strategy Guide likewise misspells the planet as "Obra-Skai."
- Star Wars: The Old Republic (Mentioned only)
- Darth Plagueis (Mentioned only)
- Jedi Academy: Return of the Padawan (Non-canonical appearance)
- Star Wars: Rebellion
- X-Wing: Wraith Squadron (Mentioned only)
- Heir to the Empire (First appearance)
- The Last Command (Mentioned only)
- Before the Storm (Mentioned only)
- Shield of Lies (Mentioned only)
- Tyrant's Test
- Specter of the Past (Mentioned only)
- The New Jedi Order: Agents of Chaos I: Hero's Trial
- The New Jedi Order: Agents of Chaos II: Jedi Eclipse (Mentioned only)
- The New Jedi Order: Edge of Victory I: Conquest (Mentioned only)
- The New Jedi Order: Edge of Victory II: Rebirth (Mentioned only)
- The New Jedi Order: Star by Star
- The New Jedi Order: Destiny's Way
- The New Jedi Order: Ylesia (Mentioned only)
- The New Jedi Order: Force Heretic II: Refugee (Mentioned only)
- The New Jedi Order: Force Heretic III: Reunion (Mentioned only)
- The New Jedi Order: The Unifying Force (Mentioned only)
- Millennium Falcon
- Heir to the Empire Sourcebook
- Dark Force Rising Sourcebook
- Star Wars Gamemaster Handbook
- A Guide to the Star Wars Universe, Second Edition, Revised and Expanded
- Cracken's Rebel Operatives
- The Thrawn Trilogy Sourcebook
- Star Wars: Rebellion: Prima's Official Strategy Guide (as "Obra-Skai")
- The Starhoppers of Aduba-3"—Star Wars Gamer 4 "
- The New Jedi Order Sourcebook
- The Official Star Wars Fact File 2 (GAM4, Gamorreans)
- The Official Star Wars Fact File 11 (PLA7, Planets of the Inner Rim)
- The Official Star Wars Fact File 16 (PLA12, Planets of the Inner Rim)
- Hero's Guide
- The New Essential Guide to Droids
- The Complete Star Wars Encyclopedia
- The Essential Atlas
- The Jedi Path: A Manual for Students of the Force
- The Essential Guide to Warfare
- Star Wars: Edge of the Empire Core Rulebook
- Star Wars: Age of Rebellion Core Rulebook