The primary planet in the Tatoo system, this desert world is located in the Arkanis Sector of the Outer Rim Territories near Piroket and Ryloth, some 43,000 light-years from the galactic core. It is close enough to a major hyperspace nexus to make it easy to get to such worlds as Coruscant and Corellia, but its environment makes it one of the most inhosptiable places in the galaxy.
The planet's twin suns mercilessly heat the planet, keeping the sodium-rich deserts alive. The planet has a single, natural satellite. Several decades before the Battle of Yavin, settlers arrived to colonize this first world in what was then called the J11.9 system. They coined the name Tatooine from the Jawa name for the planet, Tah doo Een e. The settlers established strongholds on the planet, and many smugglers and criminals have set up operational bases in its wastelands. The settlers there are primarily moisture farmers, extracting what little water they can from the atmosphere for survival.
Its location on the galactic fringes makes it a perfect base for smugglers, mercenaries, and bounty hunters. The planet, despite its hostile ecology, supports human life was well as the native races of Jawas, krayt dragons, and Tusken Raiders.
The planet's remote location appealed to Owen Lars and his wife Beru, and they lived there with Luke Skywalker for many years. Tatooine's average day lasts 23 standard hours, and its year consumes 304 local days.