Where most of the action takes place in the series, the North galaxy contains many planets that harbor life. It is ruled by the North Dai Kaio and the four lesser Kaios, who each live on their own small planetoids in heaven. Only movie #8 shows a system from another galaxy.Arlia
A fairly small world, Arlia is home to a race of insect-like creatures. The planet is controlled by an unjust ruler, and many of its inhabitants have been forced into slavery. Vegita and Nappa arrive at this planet and kill the oppresive lord, but later blow the entire system up.
Earth
A medium sized planet with large oceans and varying climates, Earth is the perfect place for life to flourish. The birthplace of all the human Z warriors, Earthlings participate in martial arts tournaments to prove their strength. All of the Dragonball series and most of Z is spent on Earth.
Kanassa
An odd fish-like race with telepathic abilities lives here. Bardock is ordered to clear this planet to be sold, and easily does so (but not before getting cursed by one of the natives).
Old Namek
Home of the Namek-jin, Planet Namek is roughly the same size as Old Vegeta, but has a slightly weaker gravity field. The Namek-jin call this place their home, and live there peacefully until and evil force comes looking for the Dragonballs. The battle with Furiza takes place here, and the planet is destroyed in the process. Orbiting three suns, Old Namek never has a night. The same Fauna and Flora lives on the entire globe, but a great variety of species exists here.
Old Vegita
Much larger than most planets, Old Vegita posesses an immense gravity field many times that of the Earth. In the beginning, Old Vegita was inhabited by two races, the Tsufuru-jin and the Saiya-jins, which were constantly at war. The Tsufuru-jin were an advanced race with hugely superior technology, but compared to the Saiya-jins, they were physically weak. When Old Vegita's moon went full, the Saiya-jins all went Oozaru and obliterated the Tsufuru-jin. Furiza later hired them as his task force, but destroyed Old Vegita when he felt the Saiya-jins were becoming a threat to his power. Goku, Vegita, Nappa, Brolli, Paragas, Taurus and Raditsu were the only Saiya-jins not on Old Vegita when it was blown to bits.
Furiza #79
One of Furiza's many bases of operation, it is the only one we are shown in the series. The Ginyu Force is stationed here, along with Vegita. It is not known what happens to this base after King Cold and his sons are killed.
Big Ghetti Star
An enormous living machine, the Big Ghetti Star travels from planet to planet, assimilating anything mechanical and sapping energy from living things. Its power is augmented when it happens upon Koola's remains. The Big Ghetti Star is eventually destroyed by Goku and Vegita.
New Namek
After the original Namek was destroyed, the Z warriors used the Dragon balls to find the Nameks a new home. New Namek is very much like the first, except it has only one sun. The Big Ghetti Star attaches itself to Namek in movie #6, scarring its face.
Meat
A fairly normal world (other than it's color), Planet Meat is wiped of all intelligent life by Bardock's team. It is also here that Dodoria and his men jump Bardock's force and slaughter them.
