Krypton

Krypton was the home planet of Kara Zor-El, Kal-El, and the Kryptonians before its destruction in 1975. It was orbiting an old red dwarf star called Rao.

Overview
The planet was separated into guilds, two known ones being the science and military. Krypton was governed by the Ruling Council, but its exact composition and functioning are unknown.

The Theft of Kandor
At some point in time, an alien pirate known as Brainiac came to Krypton and used his Hyper-Ray to shrink the city of Kandor and all of its seven million inhabitants. He enclosed the city in a bottle and placed it within a private museum on his spacecraft. As such, Kandor survived the destruction of Krypton many years later. The Kandorians continued to exist inside the city, and even manufactured an artificial red sun, which provided them with the means to thrive.

Destruction
As Kryptonian civilization flourished, the planet turned towards isolationism. Space exploration was abandoned as Krypton quarantined itself from the surrounding galaxy.

General Zod, the descendent of Admiral Zod, gained prominence in the Kryptonian Military Guild for his heroic, though futile, efforts to protect the city of Kandor from Brainiac, however, lost credibility however when he defected from the Kryptonian Defence Council, along with his wife Faora-UR, after they had been instructed to arrest Jor-El and Non after they both had made sensationalistic claims of Krypton's pending destruction. But, suddenly Non was abducted by the Kryptonian Science Council for continuing the claims and was brainwashed, lobotomized, and turned into a brutish, mute savage by the Council to be silent. When Zod, Faora-UR and Jor-El found out, both Zod and Ursa sided with Jor-El. But, they both and Non were arrested and tried for acts of sedition. They were sentenced to spend eternity in the Phantom Zone, where they would continue to exist as disembodied wraiths by Jor-El, which lead to their revenge against him and his heirs.

Jor-El was later threatened by the Science Council with the harsh penalty of exile to the very Phantom Zone he himself had discovered if he were to make public his predictions of their planet's imminent doom or otherwise attempt to "create a climate of panic." So he decided to create a star-drive ship designed for his only son, Kal-El, to escape the planet and its people's fate which he gave to his son Kal-El upon leaving for Earth. He also had his family dog in his household, Krypto used for a test flight of the rocket that would carry baby Kal-El to Earth. His niece, Kara is actually older than Kal-El; she was a teenager when he was a baby.

Also, Krypto was too sent to Earth, but his rocket was blown off course and drifted in space for many years until the rocket picked up the signal from Kal-El's rocket that landed on Earth. Krypto arrived when Kal-El was a teenager, and the two got along famously. Krypton exploded and everyone on the planet, including Jor-El, Lara, and the Kryptonian Science Council were killed. Now, all that remains of a once-great world is a particle cloud of radioactive dust.