The DBZ Universe
In the Dragonball, DragonballZ and Dragonball GT shows the Z-fighter end up fighting on many differnt planets.

Planet Earth:
The DBZ earth is much like our earth today except that it's more advanced in technogoly, there are capsules for houses and things. Another thing different is that there are dinosaurs and other different creatures.

Planet Vegeta:
Planet Vegeta is the home planet of all pure blood saiyans, It once was inhabited by two races but the saiyans destroyed the other race and claimed Vegeta as there own. The ruler of this Planet was King Vegeta.

New Planet Vegeta:
New Planet Vegeta was a man made Planet, made by Brolly's Father, Paragus. Paragus get slaves to build the planet for him so he can lure Vegeta, Goku and the other there so that Brolly can fight them. Shortly after the New Planet Vegeta is made it is destroyed.

Planet Namek:
Planet Namek is inhabited by the Namekians, such as Kami,Piccolo and Dende. The battle for the universe against Frieza and Goku was foght there.

New Planet Namek: The Namekians had to find a new home because Frieza destryoed Planet Namek so they used the Dragonballs to do so.

King Kai's Planet:
This is the planet where people go when they have died, to train and Fight when they are dead. Goku, Yamcha, Tien, Piccolo and many others have been here. This is also the home to King Kai.

Grand Kai’s Planet:
Home of the Grand Kai, Many great warriors go here to train when they die. Every so often there is a tournament where the North, East, South and West quadrants compete in a tournament. The winner get to be trained by the Grand Kai himself.

Kai Planet:
The Kai planet is Home to Supreme Kai and his ancestor before him, also Kibito lives there. The Kai planet is where The Z sword is and where the fight between Kidd Buu and Goku takes place.

Planet Plant:
Planet Plant is Bebi’s home planet.

Planet Kanassa:
Planet Kanassa is a Planet that has a powerful existance, Kanassa gives Phychic powers to know the future. Bardock recieves this from one of the planets inhabatants.

Planet Arlia:
Vegeta and Nappa stop there on their way to earth and destroy it before they leave.