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
Aurora (fictional planet) Aurora at its height had a population of 200 million humans and 10 billion robots. The head of its planetary government was called the Chairman. The largest city on the planet was Eos (which also means "dawn"), the administrative and robotic center of Aurora, where Han Fastolfe and Gladia Solaria lived. The University of Eos and the Auroran Robotics Institute were both located within Eos. We see the planet at its height in "The Robots of Dawn". In "Prelude to Foundation", we learn that at least some of its inhabitants emigrated to Trantor, settling in the Mycogen Sector. The descendants