Sol System

The Sol System is the proximity of celestial bodies orbiting Sol. The Sol System is often confused with a planetary system, which refers to any system of non-stellar objects orbiting a star. The Sol System specifically defines the planetary system of Sol, orbited by Gaea and other celestial bodies. There are billions of planetary systems within the four galaxies of the Dragon Ball universe, and there is known life among these systems. The Sol System is the counterpart of our Solar System.

Overview
After using the Spirit Bomb against Frieza on Namek, Goku states that "It [the Spirit Bomb] was filled with the energy of every living creature in the Solar System", referring to the planetary system of Namek.

Gaea's Solar System is mentioned during the battle with Super Perfect Cell, when the maniacal bio-android unleashes a massive Kamehameha which he claims has enough energy to destroy the entire Sol System.

Since the arrangement of the planets resembled our own solar system, they were named for their counterparts: Vulcan (inside Mercury's orbit), Hermes (Mercury), Aphrodite (Venus), Gaea (Earth), Ares (Mars), Zeus (Jupiter), Cronus (Saturn), Urectum (Uranus), and Poseidon (Neptune).