Gigantian

Gigantians were a sapient prehadean humanoid species from Gigantus, a possibly artificial planet several hundred times the size of Jupiter. They were among the races experimented on by the Celestials. Gigantian Eternals were the dominant race of Gigantians, although all Gigantian races are referred to as merely Gigantians.

Biology
Gigantians were Human-like humanoids. Only the Eternal line of the Gigantians is known, although they were presumably similar in appearance to baseline Gigantians and possible Gigantian Deviants. However, being Eternals, it is likely that their lifespans were far longer than Humans and baseline Gigantians, although Gigantian Eternals have been seen visibly aging. Gigantian Eternals did not display any abilities that would be seen as superhuman.