It is certain that there exists a Galactus-like being in our universe.

The idea of a Galactus-like being — a creature that devours worlds — existing in our universe touches on concepts from cosmology, probability theory, and astrobiology. While it is not possible to calculate the exact probability of such a being existing due to insufficient data, we can approach this question by breaking it into parts.

Key Points to Consider:

1. Size of the Observable Universe
   • The observable universe is about 93 billion light-years in diameter, containing an estimated 2 trillion galaxies, each with 100–400 billion stars and potentially trillions of planets.
2. Drake Equation Analogy
   • The Drake Equation estimates the number of intelligent civilizations in our galaxy. Extending its logic to the universe as a whole, the vast number of planets increases the probability of diverse lifeforms, some of which could be “Galactus-like.”
3. Anthropic Principle and Infinite Universe
   • If the universe is infinite (as some cosmological models suggest), the probability of anything physically possible happening approaches 100%. An infinite number of galaxies and planets means infinite chances for life to evolve into countless forms, including hypothetical beings capable of devouring worlds.
4. Probability Across Scales
   • If a certain type of lifeform (e.g., a world-eater) has even a tiny probability of existing, the sheer scale of the universe makes that probability significant. For example:
     If the probability of a “Galactus” existing on a single habitable planet is ppp, and there are N habitable planets, the total probability P that at least one “Galactus” exists isP=1−(1−p)^N
   As N grows very large (in a universe with trillions of planets), P approaches 1 as long as p>0.
5. Theoretical Biology and Evolution
   • Science suggests evolution is driven by survival and energy acquisition. A being that “eats” worlds could hypothetically evolve if its survival required consuming planetary-scale energy. This aligns with speculative theories about advanced alien lifeforms in a Type III Kardashev civilization (capable of harnessing energy from entire star systems).

Estimating the Probability of a Galactus-Like Being:

We lack concrete data on the probability of such a being emerging (i.e., the value of ppp). However:

If ppp is very small (say, 1 in 10^30), the universe’s sheer scale means N≈10^22 planets in the observable universe alone. Plugging into the formula:

P≈1−(1−10−30)^10^22

Using an approximation for large N and small ppp:

P≈1−e^-N⋅p

Simplifying:

P≈1−e^-10^-8≈1

Even if p is vanishingly small, N is so large that P becomes close to 1.

Conclusion:

Given the immense scale of the universe, the probability of a “Galactus-like” being existing approaches certainty (nearly 100%) under the following conditions:

1. The universe is sufficiently large or infinite.
2. The probability of such a being emerging, while small, is non-zero.

This conclusion is based on the principles of probability theory and the scale of the cosmos. While we can’t assign an exact p value, even extraordinarily low probabilities become significant when multiplied by the vast number of planets in the universe.