Wegthor was an inhabited moon that orbited the planet Krypton.
Knowledge hungry scientist, Jax-Ur, constructed a nuclear bomb so destructive that it could obliterate part of a planet with the intention to use it to overthrow Krypton's Law Council. He tested it on Wegthor first. The bomb destroyed most of it and those who resided there. The Law Council discovered Jax-Ur's deeds and intentions, he was caught and sentenced to the Phantom Zone.