Corellia was the capital planet of the Corellian system, which included Selonia, Drall, Tralus, and Talus. It was also the birthplace of smuggler and New Republic General Han Solo as well as Rogue Squadron pilot and New Republic hero Wedge Antilles, along with many other humans who played important roles in the histories of the Rebel Alliance, New Republic, and Galactic Alliance.
Collectively, the planets of the system were known as the Five Brothers. As the largest planet and the closest to Corell, Corellia was often called the "Eldest Brother" or the "Eldest." Historians believed the Celestials assembled the system artificially, the worlds brought from other parts of the galaxy for unknown reasons. Some believed that these Celestials populated Corellia with Humans from Coruscant. Corellia's surface was extremely temperate, dominated by rolling hills such as those of Bindreg, thick forests, lush farmland, golden beaches, and large seas. Snow-covered mountains dominated part of the landscape. With most of its famed manufacturing centers lifted into orbit, the planet remained largely rural and undeveloped, with small villages and farming communities comprising the bulk of urban development. It is rumored to have many deep underwater caverns with orange Lightsaber crystals.
The largest cities were Coronet—the planetary capital, the tourist haven of Kor Vella, the double-city Tyrena, and the mountain hamlets of Doaba Guerfel and Bela Vistal. Immigrants from the neighboring planet of Selonia constructed an elaborate network of tunnels beneath the planet's surface. These Selonian Tunnels were used by people of all races as a kind of subterranean metropolis, though the deepest levels were traveled exclusively by Selonians. Space above Corellia was dominated by massive shipyards.