As a subject matter expert in comic book lore, I can provide you with an understanding of Galactus' origin as depicted in the Marvel Universe.

Galactus, one of the most powerful beings in the Marvel Universe, is a cosmic entity whose birth is shrouded in mystery and has been the subject of various retellings and interpretations. The original story, as presented in the comics, involves a cosmic event that transformed a humanoid alien named Galan into the Devourer of Worlds.

Galan was a scientist from the planet Taa II in the Galactic Council. During a mission to investigate a strange phenomenon, Galan was exposed to the Cosmic Awareness, a sentient force that existed before the universe. This force chose Galan to become its herald and guardian, to maintain the balance of life and destruction in the universe.

The transformation process was arduous and nearly fatal. Galan was enveloped in a cosmic energy that reshaped his form into the massive, god-like being known as Galactus. His insatiable hunger for energy, particularly the consumption of planets, became his defining trait. This hunger was not a choice but a necessity to sustain his new form and power.

Galactus' existence is tied to the cosmic balance. He consumes planets to prevent the universe from collapsing under the weight of its own life force. His heralds, like the Silver Surfer, often seek out suitable planets for him to consume, ensuring that life can continue in the universe.

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Galactus is the sole survivor of the sixth incarnation of the Multiverse. Originally Galactus was a humanoid named Galan, born in the previous incarnation of Earth-616 on the planet Taa, a paradise-like world whose civilization is said to have been the most advanced of any of the known universe of that time.read more >>