A relic of the Soviet space program who got lost in orbit in the early sixties, Cosmo now heads up the security forces in a place called Knowhere. Cosmo met a distraught Nova shortly after he witnessed a female alien with the alias Suspensor turned into a zombie right before his eyes. She attacked, and Nova accidentally killed the woman in self defense only to have her allies Cynosure, Crater and Discharge blame him for her death. Unable to battle the three powerful aliens, Nova retreated and was surprised yet again with his discovery of a talking dog. However, Cosmo gained Nova’s trust and friendship, and the two set out to find the fiend responsible for all the recent deaths on Knowhere.

Cosmo brought Nova up to speed on when the events started, and Worldmind added any data he had at his disposal. Cosmo was mainly concerned with the safety of the remaining citizens of Knowhere who were safely hidden away in a Dimensional Envelope he wore on his collar. It wasn’t long before Cosmo and Nova were ambushed by more zombies including the surviving members of Suspensor's former team, the Luminals, and determined that the creature known as Abyss was behind the mayhem. Together, Nova and Cosmo fought off the attacks, sealed Abyss inside his prison, and brought serenity back to Knowhere. As a final parting gift to Nova, Cosmo charted a course to the birthplace of the Phalanx, Kvch, in hopes that Nova could find a way to cure himself of the "transmode virus" that was slowly killing him. Just when Cosmo thought that peace was restored, alarms were triggered as a murderous Gamora and Drax – now under the control of the Phalanx – slaughtered many innocents on Knowhere in their pursuit of Nova. Cosmo arrived too late to engage them before they could follow the same path as Nova through the Continuum Cortex.

Recently, Cosmo has become the liaison to the new Guardians of the Galaxy and assists them in plotting courses for the trouble-spots in the universe.