Mace Windu was born on the planet Haruun Kal, around 50 years before the clone wars and because of his natural affinity to the force, he was quickly discovered and taken to the Jedi temple on Coruscant. After constructing his first amethyst lightsaber as a youngling, Windu was promoted to the rank of Padawan and became the apprentice of Cyslin Myr.

The planet Haruun Kal (Above the Clouds in Basic, also known as Haruun Kul or Al’Har I), located in the Dustig sector of the Mid Rim on the Gevarno Loop, was the homeworld of the famed Jedi Master Mace Windu. Its capital was Pelek Baw.

The only world in the Al’Har system, Haruun Kal appeared to be an oceanic world from space. However, this «ocean» was in fact a sea of toxic gases brought to the surface by volcanic activity, and broken by mountains and plateaus. Only the landmasses that reached into the atmosphere could support life, and thus it was high in these mountains and plateaus where native life evolved.

Native Humans of the world, known as Korunnai (Uplanders), were all Force-sensitive. There were many theories explaining this remarkable phenomenon. The most popular, held by the Jedi Council, indicated that during the Great Sith War a starship transporting Jedi Knights crashed on the planet, and that the marooned survivors were the ancestors of the Korunnai. This view was supported by the fact that the vibroshields used by Kar Vastor and his Akk Guards were made of ultrachrome, a metal that was used in shipbuilding during the Great Sith Wars.

The planet had a rotation rate of 25.5 standard hours, and a year length of 383 local days. Its diameter was 10,120 kilometers, and had .98 standard gravity.

All electronics on the planet had to be rubbed down with portaak amber to prevent the planet’s various metal-eating and silicate-eating fungi from destroying them; even with the amber, electronics were somewhat vulnerable.