The planet was separated into guilds, two known ones being the science and military.
War with Daxam
Krypton is known to have feuded with her sister planet Daxam over various things such as Democracy vs. Monarchy and how life should be lived. Both Krypton and Daxam went to war over their respective ideals, with casualties in the thousands.
In 1979, the planet was known to be unstable, and would soon be destroyed. Amidst the chaos caused by the impending death of the world, members of the House of El chose to save who they could by sending them away from the planet. The infant Kal-El was sent to Earth, and his cousin, Kara Zor-El, was sent along with him, and instructed to look after him. Shortly following their departure, the planet finally destabilized and exploded, destroying it utterly. The destruction of the planet knocked Kara's pod off course, and also sent radioactive pieces of the mineral Kryptonite flying into space, some of which found its way to Earth.
- "Invasion!" (mentioned)
- "Crisis on Earth-X, Part 2" (mentioned)
Adventures of Supergirl
- "Chapter 1" (flashback)
- "Chapter 6" (dream)
- "Chapter 7" (mentioned)
- "Chapter 9" (mentioned)
- "Chapter 10" (flashback)
- "Chapter 13" (mentioned)
- Birds did not exist on Krypton.
- Harry Wells implied that just as there are 53 (known) different versions of Earth, there exists multiple versions of Krypton in the multiverse, not just in Earth 38 and Earth X.
Behind the Scenes
- Krypton was first featured in Action Comics #1 (June, 1938) and was created by Jerry Siegel and Joe Shuster.