Krypton is a fictional planet appearing in American comic books published by DC Comics, most commonly appearing or mentioned in stories starring the superhero Superman as the world from which he came. The planet was created by Jerry Siegel and Joe Shuster, and was named after the chemical element krypton. It was first mentioned in Action Comics #1 and made its first appearance in Superman #1. Krypton is destroyed immediately after Superman, as the baby Kal-El, is sent from the planet in a spacecraft by his parents, although the exact details of its destruction have varied over publication history.