Kal-El's rocket and the forcefield surrounding Argo City, a third avenue for escaping the planet is represented by hordes of engineers who do believe Jor-El's warning and attempt to build several space arks to escape the planet. Tragically, they are unable to complete the ships fast enough. In the novel, Kryptonopolis is built over the ruins of Xan City. See also Fictional planets Phaeton (hypothetical planet), whom British-born astronomer Michael Ovenden suggested be named "Krypton" after Superman's home world instead References External links Supermanica: Krypton Supermanica entry on the pre-Crisis Krypton. Superman Shield Evolution with picture 1938 in comics 1939 in comics Fictional elements introduced in 1938 Fictional destroyed planets DC Comics aliens DC Comics dimensions DC Comics planets Fictional terrestrial planets Fiction set in the Andromeda Galaxy Superman