Conjectural Information
The title or other information in this article is conjectural.
The information here does not contribute anything canonical in the SuperFriends Universe.
It has been conjectured based on information from the known DC Universe at the time.
Please see the reasons in the "Background Information" section below, and/or the relevant discussion on the talk page.

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Real name: Jax-Ur
Species: Kryptonian
Homeworld: Krypton
Universe: Earth-One

Jax-Ur was a scientist from the planet Krypton.



In 1922, Jax-Ur and his team of scientists constructed space arks with the purpose of exiling the Science Council in outer space.[1] As a result, they were sent into the Phantom Zone by Jor-El.[2]

In Superman's Black Mercy-induced dream, the Anti-Phantom Zone Campaigners demanded the release of Jax-Ur from the Phantom Zone, as they viewed the Phantom Zone Ray as an instrument of torture.[3]

Background Information

In the parallel-universe of Earth-1A, shortly before the destruction of Krypton, a team of unnamed scientists (presumably Jax-Ur, etal) were sent to the Phantom Zone when they attempted to strand the Science Council in outer space. His crime led to a new law being developed that would make space travel illegal.[4]


In the parallel-universe of Earth-One, the mad-scientist Jax-Ur, was sentenced to the Phantom Zone fro destroying an inhabited Kryptonian Moon during an experiment.[5]


  • Jax-Ur made his first appearance in Adventure Comics, #289 (October 1961).
  • He was created by Otto Binder and George Papp.


SuperFriends TV Show (1973-85):

Super Friends books


  1. As seen in the Superfriends season one episode The Planet-Splitter (1973).
  2. As implied in the comic story: For the Man Who Has Everything (1986).
  3. As seen in the comic story: For the Man Who Has Everything (1986).
  4. The unnamed scientist is presumed to be Jax-Ur. This is merely conjecture based upon DC Comics.
  5. As revealed in Adventure Comics. #293 (February 1962).
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