Since their rescue from Brainiac, the scientist of Kandor have been busy attempting to unravel the secrets of his technology. In the end they were successful, and Alura concocted a plan to deal with their problem on Earth. Having citizens of the city lift it and the surrounding terrain into space, kept safe by Brainiac's force-field technology, they used his tech to tera-form a new planet Krypton, placing it into orbit on the opposite side of Earth's orbit, placing the sun between them.
Its presence, is both a beacon of hope for Kryptonians, and a possible threat to human's everywhere. All Kryptonians except Superman are now banned from Earth. In Superman #685, Superman decides to leave Earth to live on New Krypton. He does this to keep on eye on Alura, to find out what Zod is up to, and to heal the relationship between Earth and New Krypton.
New Krypton is destroyed when a kryptonite bomb, placed inside the villain Reactron by Lex Luthor, explodes, destroying the planet and most of its inhabitants.
The planet Jekuul is conquered by Zod and renamed New Krypton.