|First appearance||Adventure Comics #359 (August 1967)|
Takron-Galtos is a planet-sized prison built to house the most dangerous criminals in the galaxy. It exists in the 20th Century, as shown in Justice League of America #247, February 1986. It is featured in JLA #21, when Adam Strange, along with the League, tricks an invading force of aliens, the En'teran Slavemasters. The aliens end up teleported to the surface of Takron-Galtos.
During a prisoner uprising a guard named G'Hu is captured. By the time fellow guards break in, G'Hu has defeated his captors. This action causes him to be recognized and recruited for the Green Lanterns.
A Takron-Galtos prisoner is recruited for the Lantern's enemies, the Sinestro Corps. Bur'Gunza, a model prisoner is let out of his restraints on the day of his release. He slays forty-two guards before he is defeated. This brings him to the attention of the Sinestro Corps.
Takron-Galtos is still in use in the 30th Century. Most of the prison functions are automated, and the administrative staff consists of a warden and a small group of Science Police.
In the planet's first appearance, members of the Legion of Super-Heroes are imprisoned there after the new President of Earth, Kandro Boltax, outlaws the Legion. The young superheroes are released after Boltax is revealed to be the supervillain Universo, who had turned the population of Earth against the Legion by putting a mind control chemical in the water.
In the miniseries Final Crisis: Legion of Three Worlds, Superboy-Prime launches an attack on Takron-Galtos and frees every inmate. His purpose is to re-gather the 'Legion of Super Villains' in order to take on the Legion of Superheroes. He then proceeds to scorch the planet's surface and brand it with the Superman insignia. Twenty-thousand staff and guards are murdered in the conflict. In the final issue, #5, the planet is shown to be under reconstruction.
In the alternate future timeline of Justice League 3000, the League members are teleported to the prison planet of Takron-Galtos by the godlike villainess Locus. The planet appears to have been ravaged by untold disasters, is heavily polluted, and the convicts face brutal conditions; surviving on fossil fuels, converted human waste, and whatever technology they can scavenge. Of the eight million prisoners, most are radical poets and progressive thinkers who live in the few remaining cities, the more dangerous criminals being shipped to the "wastes" beyond. After being captured by the local inmate-guards, the heroes are brought deeper into the city, only find themselves in downtown New York City-- revealing that the prison was once in fact Earth.
Appearances in other media
Takron-Galtos has appeared or been mentioned in several episodes of the Legion of Super Heroes animated television series. As in the comic books, Takron-Galtos is used as a prison planet for the galaxy's worst criminals.
- JLA #21 (August 1998)
- Green Lantern Corps #1 (August 2006)
- Sinestro Corps Special #1 (August 2007)
- Legion Worlds #5 (October 2001)
- Legion of Super-Heroes (vol. 3) #18 (January 1986)
- Crisis on Infinite Earths #10 (January 1986)
- Final Crisis: Legion of Three Worlds #1-5 (October 2008-September 2009)
- Legion of Super-Villains #1 (May 2011)
- Justice League 3000 #03 (April 2014)