Quasar is the name of several fiction superhero in the Marvel Comics universe.
Neutron, an alien member of the Shi'ar Empire's Imperial Guard briefly used the name Quasar. He fought Quasar in Quasar vol.1 #33 (1992) and again in #45 alongside Sergi Krylov. Both Krylov and Neutron had been trapped by Quasar in a realm of potential energy called the Quantum Zone, and both were seeking revenge. Quasar eventually tricked Sergi into abandoning the fight and Neutron was picked up by his team, the Imperial Guard, abandoning Quasar.
Wendell Vaughn is one of Marvel's cosmic heroes, a character whose adventures frequently take him into outer space or other dimensions. However, Quasar deviates from the archetype of the noble, dauntless alien set by such Silver Age cosmic heroes as the Silver Surfer, Adam Warlock and Captain Mar-Vell in that he is an everyman. He starred in an eponymous monthly ongoing series written by Mark Gruenwald that ran for sixty issues beginning in 1989 and has served as a member of The Avengers. He was the Protector of the Universe and fought many foes, including Magus, Oblivion, Her, and Maelstrom, before apparently perishing at the hands of Annihilus, who drains the energy from the Quantum Bands. His spirit was later revealed to be holding the spirit of Annihilus in check.
Recently, during the Secret Invasion crossover, it was revealed that scientists had found some "exotic radiation" in the Negative Zone and extracted it. Bringing it to Project: Pegasus, they 'awakened' it with Nova's help. It exploded from the 'Quantum Flask' which held it and began speaking to Nova, calling him Richard. Nova mistook the voice for the Xandarian Worldmind at first, but then the voice was revealed as belonging to a resurrected Wendell Vaughn in a Quantum energy form.
Read more about Quasar (Wendell Vaughn) at Wikipedia ...
Official Site: Marvel Comics
Links: Wikipedia Marvel Universe Antaninet - Quasar Page