Cybertron

Cybertron is a Class-K planet located approximately seven-thousand light-years from Earth. Cybertron has no atmosphere, only a planetary shield to protect its inhabitants from orbital bombardment during wars. Cybertron is self-sustained and does not orbit a star. Cybertron is ten times larger than Earth, however, Cybertron has the exact same gravity as Earth due to Cybertron's gravity being modifiable.