Via cosmic staff: Starman (Jack Knight) is fictional superhero in the DC Comics Universe and a member of the Justice Society of America.

Jack reluctantly makes a deal to become Starman if his father agrees to devote his scientific knowledge to the betterment of mankind.

To do so, he travels to Hell to rescue two men he hardly knows, tries valiantly to save a friendly incarnation of Solomon Grundy, and helps prove Bulletman's innocence when he is accused of having been a Nazi agent during World War II.

Working alongside his father's contemporaries, Jack fights the wizard Mordru, the terrorist organization Kobra, and the time-traveler Extant.

Jack also finds common ground with Jake "Bobo" Benetti, a retired super-strong bank robber from his father's days.

When she reveals that she is the sister of Will Payton, yet another hero to bear the name of Starman, he vows to set off into space to find her missing brother.

Finally, equipped with his father's consciousness duplicated in a Mother Box, and joined by Mikaal Tomas, Jack sets off on an intergalactic journey.

He meets the Legion of Super-Heroes, counsels Jor-El (father of Superman), and then helps Adam Strange fight an invading empire.

As a prisoner of the empire, Jack foments revolt to escape, working with members of the Green Lantern Corps, the Omega Men and the New Gods.

James Robinson returned to the Starman series in January 2010 for a single issue (#81) that was a tie-in to the DC event, Blackest Night.

[2][3] During the events of the issue, David's corpse is reborn as a Black Lantern; he attacks the Shade and Hope O'Dare, and announces plans to go to San Francisco to kill Jack, but he is ultimately defeated.

Though he takes his name and motif from the Star-Spangled Kid, Stars uses Jack's cosmic staff and dresses in a similar leather jacket and bandana.

In the alternate future of the Titans Tomorrow, Courtney has changed her name to "Starwoman" and now carries Jack's trademark jacket in addition to the staff.

This is based on an earlier concept introduced in Young Justice: Sins of Youth when Courtney and Jack temporarily changed roles after being turned into an adult and child, respectively.

[5] The character of Jack Knight, specifically his relationship with his father and Opal City, has been seen as an example of a "new wave" of DC Comics from the 1990s reviving Golden Age heroes, with an emphasis on nostalgia, legacy, and mythology building.