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.

[1] He continued to make guest appearances in Captain America, The Incredible Hulk, Marvel Two-in-One, and The Avengers.

Quasar received an eponymous series in October 1989, written by Mark Gruenwald and illustrated by Paul Ryan and Danny Bulanadi.

He appeared as a spirit in Annihilation: Conquest: Quasar #1-4 (Sept.-Dec. 2007), by writer Christos Gage and penciller Mike Lilly.

An astral form of Quasar had a recurring role in Nova vol 4 beginning with issue #17, as the writers Dan Abnett and Andy Lanning (known collectively as DnA) thought he was too useful a character to stay dead: the writers felt Vaughn's unique powers, never say die attitude, and everyman perspective made him too good of a character to stay dead.

[3]The character regained a physical form in the Realm of Kings one-shot (2009) and played a role in The Thanos Imperative (2010).

Although considered highly capable by his superiors, they nonetheless deem him unfit for field work, sensing that Vaughn lacked the necessary "killer instinct"—the will to win at all costs.

[4] His first assignment is security detail for a research facility where a team of scientists were performing experiments on the Quantum Bands taken from the deceased Crusader.

A test pilot selected to wear the bands proves spectacularly successful at wielding them, but he perishes when the energy output reaches a critical mass beyond his control.

[9] Later, as security chief of Project: Pegasus, he battles the original Deathlok, Nuklo, the Grapplers, and the Nth Man when they attack the facility.

[4] Eon explains the bands were intended to be worn by his agent, the Protector of the Universe (previously the late Captain Mar-Vell).

[20] When a stargate being used by the Shi'ar during the Kree-Shi'ar War threatens to destroy Earth's sun, Quasar is able to undo the damage with the help of Binary.

[23] He is briefly replaced by a supervillain who claims his Quantum Bands for himself but Quasar is able to resurrect himself through means of the Star Brand, which he had acquired during a trip to the New Universe prior to the Infinity War.

[24] He saves the Living Tribunal from power-hungry Deviant Ereshkigal and stops Skeletron and The Black Fleet from acquiring the Star Brand for themselves.

[27] Quasar helps to operate an Avengers deep-space sensing station with the support of Living Lightning and Monica Rambeau,[28] and then becomes involved in Kang's War.

[36] The team protects Galador from an invasion of the Dire Wraiths and brings an end to the generations long war between the two worlds.

[37] The Annihilators learn of an attempt to revive the Magus by the Universal Church of Truth, and they prevent his resurrection with the aid of the Avengers.

storyline, Vaughn begins to lose control of the Quantum Bands and willingly allows his memories and appearance to be altered by Kobik in Pleasant Hill, a secret S.H.I.E.L.D.

When Wendell's memories are restored during Baron Helmut Zemo's prison revolt, he bequeaths the Quantum Bands to a young S.H.I.E.L.D.

[4] While he possessed the power of the Star Brand, Quasar gained the abilities of flight, superhuman strength and resilience.

[41] Quasar also briefly possessed the same powers of cosmic awareness that Eon granted to Kree soldier Mar-Vell (later known as the original Captain Marvel).

[45] Once, during a trip through alternate realities, the Earth-616 version of Quasar viewed his Captain Universe-enhanced counterpart and Set battling each other.

Quasar murders his reality's human Kitty Pryde, holding her underwater until she is forced to turn solid, upon which it is implied that Namor eats her.

agent Wendell Vaughn is the head of security for the top secret Project Pegasus in Devil's Point, Wyoming.