Argo was a sister planet of Krypton, orbiting Rao, and located in the Ku'Raon System.
History[]
Tragically, Argo became the site of the "Argo Tragedy". The Eradicator that used against an invading alien race was reactivated and causing every man, woman, and child on Argo to go horribly insane.
When Krypton exploded, the shock-wave pushed Argo to the very edges of Rao's gravity-well, which resulted in a now-permanent ice-age.