His real name is Vance Astrovik, which was shortened to Vance Astro when he joined his first superhero team, the New Warriors. Throughout his time with the team he was sort of their moral compass always trying to use his powers to keep from killing. During the series it was revealed that Vance was a teenager whose father was abusive to him and his mother. In one attack after suffering a defeat in his superheroic identity, his father attacked him and his mother and Vance accidentally killed his father with his telekinetic powers. He was brought up on charges and confessed to the crime. He was found to be acting in self-defense for the most part, but did have to serve a manslaughter sentence in the Vault. After doing so, he and Firestar quit the New Warriors and joined the Avengers.
Sometime later, and possibly from an alternate reality, Vance is put into suspended animation within a more hermetically sealed suit. He is awakened similar to Captain America's origin, only it is in the timeline in which the Guardians of the Galaxy exist... the 30th century. During this series, he goes on a quest to retrieve Captain Amrica's shield, which had fallen into the hands of a villain. Once it is retrieved, Major Victory changed his name to Captain Victory and moral of the remaining human race which is boosted by this symbol of Freedom and determination. Vance starts to use this shield in similar fashion as Captain America did and continued to do so until the Guardian of the Galaxy series was cancelled.
I have left out some details of course, butthis covers most of what has to do with this character.
