Personal Info:
Real Name: Jonar Jon Carter
Also Known As: No known Alias
Place Of Birth: 25th Century
First Appearance: Booster Gold Vol.2 #1 (2007) Modern Age Villain
Known Associates: Despero, Mister Mind, Per Degaton, Rex Hunter, The Ultra-Humanite, Black Beetle
Group Affiliation: Time Stealers
Base Of Operations: Mobile
Grudges: Booster Gold
Creators: Geoff Johns, Jeff Katz and Dan Jurgens
Size Changing Belt: The Supernova suit contains a copy of the white dwarf star size-changing belt used by the Atom.
Phantom Zone Projector: Supernova uses the Phantom Zone Projector built into his suit to teleport matter from one place to another through the Phantom Zone itself.
Lasers: Supernova suit contains a mining laser.
Flight: Supernova is able to fly.
Carter was a chaotic man, constantly in debt because of his gambling habit. It is unknown if Carter was this way before he married. But this gambling problem caused him to leave his wife and twin children Michael & Michelle when they both turned the age of 4.
For more then a decade, the father never let anyone hear from him, until his gambling debts sky-rocketed. Debt collectors wanted to see money, and to make an example Carter's face was cut. Afraid, he turned to his only son for aid, Michael, an experienced college football player at that time. The father asked his son to rig a few of his games so he could make easy money. Unknown to the father, Michael had already done this to save his mother's life and was already blackmailed into continuing this gambling affair. Michael was caught and thrown out of college, robbed of his promising future. Carter himself ended up in prison, where he would stay awhile.
Carter was sprung out of jail by Rex Hunter of the Time Stealers, who needed a field agent. For Carter it was an easy choice: recreate himself as one of the greatest heroes in history, or spending 10 more years in jail. Somewhere in this time, Mister Mind took possession of his body by hiding near his left eardrum. Carter stole the Supernova Costume from his ancestor Daniel Jon Carter, and because of his genetic compatibility he could operate it and became became the third Supernova.
Supernova at DC Database
Supernova at Comic Vine