Thom Kallor

Starman
Thom Kallor as the new Starman, from the cover of Justice Society of America vol. 3, #2. Art by Alex Ross.
Publication information
Publisher	DC Comics
First appearance	Adventure Comics #282 (March 1961)
Created by	Otto Binder George Papp
In-story information
Alter ego	Thom Kallor
Species	Metahuman
Place of origin	Xanthu (31st century)
Team affiliations	Legion of Super-Heroes Legion of Substitute Heroes The Uncanny Amazers Justice Society of America
Notable aliases	Star Boy, Danny Blaine, Sir Prize
Abilities	Capable of increasing the mass, density or gravity of an object

Thom Kallor is a fictional character appearing in comic books published by DC Comics. He has many incarnations connected to the Legion of Super-Heroes. The character has also been known as Star Boy and Starman. Star Boy was based on an earlier character named Marsboy and later "updated" as a member of the Legion in a story recycling technique often employed by then Superman editor, Mort Weisinger, according to long-time Legion writer, Paul Levitz.

Star Boy is a member of the Legion of Super-Heroes, a group of young heroes living a millennium in the future. He was born to astronomer parents on an observation satellite orbiting the planet Xanthu with the ability to temporarily increase the mass of an object, up to the mass of a star. Although he temporarily acquires Kryptonian-level powers similar to those of Superboy when he was caught in the tail of a comet, these eventually fade (leaving only his original density-increasing power). Early in his Legion career, he travels to the 20th century to meet Superboy. While he is there, to make Superboy jealous Lana Lang threatens to expose his identity (a secret on Xanthu) if he refuses to pretend to be her boyfriend. However, the Boy of Steel overhears her and her plan fails.

Star Boy is expelled from the Legion for killing his girlfriend Dream Girl's ex-boyfriend Kenz Nuhor in self-defence, in violation of the Legion's rule against killing. After this, he and Dream Girl join the Legion of Substitute Heroes before returning to the Legion. Although Star Boy originally wears a purple uniform with a white cape and five-pointed yellow star on his chest, his best-known costume is a full-body starfield suit with white gloves and boots.

After the events of Zero Hour and the death of Kid Quantum, Xanthu's original representative to the Legion, Star Boy joins the Legion. He does not get along with Leviathan, partly because Leviathan blames himself for Kid Quantum's death and sees his replacement as a reminder of his failure as a leader.