The Adventures of Superman (radio) home planet of Krypton is located on the far side of the sun, as opposed to a distant star system as it is in most stories. During the journey to Earth, baby Kal-el grows into an adult and emerges fully grown from his ship after it lands on Earth. He is never adopted by the Kents but immediately begins his superhero career. This was eventually retconned in later episodes to match the narrative of the comic books. This serial introduced the fictional mineral kryptonite, the radiation from which can weaken and even (in some continuities) kill Superman. Aside from giving
Rann (fictional planet) Rann (fictional planet) Rann is a fictional planet in the Polaris star system (formerly in the Alpha Centauri System) of the whose capital city is "Ranagar". Rann is most famous for being the adopted planet of the Earth explorer and hero Adam Strange and for their teleportation device called the Zeta Beam. The planet Rann, along with her famous non-native son, first appeared in "Showcase" #17 (November–December 1958). Natives of Rann, known as Rannians, are for all intents and purposes the same as Earth-based humans. However, years of reclusive living and apathy brought on by reliance upon their technologically advanced