Planet (Great Empires)

A planet is a celestial body generally orbiting a star or in rare cases a black hole. Planets can be as small as 5,000 kilometers to more than 100,000 kilometers. They can be composed of rock, gas, metal, molten rock or something else. They have an atmosphere which may be breathable. Some planets however do not orbit anything but float freely in space, these planets are called rogue planets or nomad planets.