Eternity is a fictional character

Fictional character

A character is the representation of a person in a narrative work of art . Derived from the ancient Greek word kharaktêr , the earliest use in English, in this sense, dates from the Restoration, although it became widely used after its appearance in Tom Jones in 1749. From this, the sense of...

 that appears in comic book

Comic book

A comic book or comicbook is a magazine made up of comics, narrative artwork in the form of separate panels that represent individual scenes, often accompanied by dialog as well as including...

s published by Marvel Comics

Marvel Comics

Marvel Worldwide, Inc., commonly referred to as Marvel Comics and formerly Marvel Publishing, Inc. and Marvel Comics Group, is an American company that publishes comic books and related media...

. Created by scripter-editor Stan Lee

Stan Lee

Stan Lee is an American comic book writer, editor, actor, producer, publisher, television personality, and the former president and chairman of Marvel Comics....

 and artist-plotter Steve Ditko

Steve Ditko

Stephen J. "Steve" Ditko is an American comic book artist and writer best known as the artist co-creator, with Stan Lee, of the Marvel Comics heroes Spider-Man and Doctor Strange....

, the character is first mentioned in Strange Tales

Strange Tales

Strange Tales is the name of several comic book anthology series published by Marvel Comics. It introduced the features "Doctor Strange" and "Nick Fury, Agent of S.H.I.E.L.D.", and was a showcase for the science fiction/suspense stories of artists Jack Kirby and Steve Ditko, and for the...

#134 (July 1965) and first appears

First appearance

In comic books and other stories with a long history, first appearance refers to the first occurrence to feature a fictional character.-Monetary value of first appearance issues:...

 in Strange Tales #138 (Nov. 1965).

Debuting in the Silver Age of Comic Books

Silver Age of Comic Books

The Silver Age of Comic Books was a period of artistic advancement and commercial success in mainstream American comic books, predominantly those in the superhero genre. Following the Golden Age of Comic Books and an interregnum in the early to mid-1950s, the Silver Age is considered to cover the...

, the character has appeared in four decades of Marvel continuity and appeared in associated Marvel merchandise including animated television series; trading cards and video games.
Eternity debuted in an epic 17-issue storyline in the ongoing feature "Doctor Strange

Doctor Strange

Doctor Stephen Strange is a fictional character that appears in comic books published by Marvel Comics. The character was co-created by writer-editor Stan Lee and artist Steve Ditko, and first appeared in Strange Tales #110 ....

" in Strange Tales

Strange Tales

Strange Tales is the name of several comic book anthology series published by Marvel Comics. It introduced the features "Doctor Strange" and "Nick Fury, Agent of S.H.I.E.L.D.", and was a showcase for the science fiction/suspense stories of artists Jack Kirby and Steve Ditko, and for the...

#130-146 (March 1965 - July 1966).