Urum was a planet without an atmosphere. Half of the planet was destroyed by a meteor which crashed onto the planet and broke off half of the planet. The shattered part of the planet became an asteroid-field that surrounded the meteor. The planet's located in the Urum system. Its inhabitants weren't required to breathe, but because they wanted to trade with the other planets, they built a huge shield with air inside it. This also protected them from the meteors. After the first Urunian war its population began to grow strong because of the many immigrants. About three hundred years after the war, the planet was one big city.