Basilisk was home to the Basiliskans, an intelligent lizard species. During their war with the Mandalorians , the Basiliskans chemically poisoned their own planet, in a last effort to defeat their conquerors.

It sat at the strategic intersection of the Perlemian Trade Route and the Hydian Way. Brentaal was a small, dry planet whose eight continents were separated by small, salty oceans, and that had a diameter of 6,985 miles

The Corellian System, the most important in the Corellian Sector, contained five inhabited worlds collectively referred to as the Five Brothers. Corellia, Selonia, Drall, Talus, and Tralus were all believed to have been transported through hyperspace to their orbits by the Architects, utilizing the ancient Centerpoint Station 1,000,000 BBY.

The most habited planet in the Galaxy and center of the Empire.

Duro (also known as Duros) was the heavily polluted and depopulated homeworld of the Duros species. Located on the Corellian Trade Spine, the planet itself was mostly abandoned, housing mostly food processing plants. Most people lived in one of the twenty orbiting cities. Duro was also home to a large number of orbital shipyards.

Fresia was a Core World which served as headquarters for Incom Corporation since 2,000 BBY.

Home of the famous Kuat Drive Yards, this planet has long been the most prominent military ship building planet in the galaxy.

Xa Fel is a planet in the Kanchen sector of the Core Worlds populated by its eponymous near-human race. The unscrupulous manner in which Kuat Drive Yards managed a gargantuan manufacturing facility left the world terribly polluted and eroded, devoid of natural resources.