Hello, I'm an expert in comic book lore and superhero narratives. Let's delve into the reasons behind Superman's powers on Earth.

Superman's abilities are a result of Earth's yellow sun. On his home planet of Krypton, Superman, born as Kal-El, had the same powers as any other Kryptonian. However, Krypton's sun emits a red sun, which does not grant Kryptonians superpowers. When Kal-El was sent to Earth as a baby, the exposure to Earth's yellow sun triggered his extraordinary abilities.

The yellow sun provides the necessary radiation that activates and enhances the Kryptonian cellular structure, giving Superman his super strength, flight, invulnerability, heat vision, and other powers. Without this radiation, Superman would be as powerless as a regular Kryptonian.

Additionally, it's worth noting that Superman's powers can vary in strength depending on the amount of solar energy he absorbs. The longer he is exposed to the yellow sun, the stronger he becomes, up to a certain limit.

In contrast, if Superman were to be exposed to a red sun, he would lose his powers because the red sun does not provide the necessary radiation to activate his Kryptonian physiology.

So, the key factor for Superman's powers on Earth is the yellow sun and its unique radiation that interacts with his Kryptonian biology.

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Superman derives his power from the yellow sun of Earth. Forced under a red sun akin to the red sun of his homeworld, Krypton, or exposed to red sun radiation, Superman rapidly loses his powers, reverting to the stature of a normal human.read more >>