Where are the aliens in a universe that big?

A "brain hole" is when a person's imagination is so rich that it reaches the point of the unimaginable (inhuman ability).

Or one uses one's imagination so much that one is left with a "deep hole" and expects others to fill it.

Astrophysics is a discipline of imagination + circumstantial evidence.

The strength of circumstantial evidence depends on its combination with other evidence.

The universe is a super-hole that cannot be filled by the human imagination, so I'll start by throwing in the towel for those who are interested in a fantastical journey of imagination!

(The sun could fit 1.3 million Earths, and the sun releases more energy in one second than has been produced in the entire history of mankind.)

One, how big is the universe?

(The second largest structure in the universe discovered by a man so far, the Sloan Wall)

a. The largest structure in the Universe: the Large Quasar Group is the largest known structure in the Universe, a "large quasar group" of 73 ancient quasars or galaxies, stretching a staggering 4 billion light-years deep.

Images

(Don't go outside, there are frog-eating aliens out there)

b, humans have no way of knowing how big the universe is, they are like ants at the bottom of a well (probably not even frogs on a scale) and don't know how big the Earth is without knowing when they will climb up to the edge.

Second, are there aliens?

So far, in the last 50 years of searching, astronomers have not found any solid clues to aliens.

The evolution of life is a super-slow process that has taken as long as the evolution of the Sun.

Assuming that the 50-year history of the solar system is scaled down to 1 "cosmic year", 1 second = 160 years.

The Big Bang solar system was born in about 2 years.

Earth takes shape in January of the 3rd year of the Universe, the Earth appears in March-April as an ancient single-celled organism like blue-green algae. single-nucleated large cells in September, and multi-celled organisms around 15 October. End of November of year 3 of the universe plants and animals conquer most of the land.

Dinosaurs appear on 18 December of the 3rd year of the Universe. Dinosaurs dominate the Earth for a week before becoming extinct on 25 December.

In the 3rd year of the universe, Peking Man was born at 11pm on New Year's Eve and Neanderthals appeared on Earth 10 minutes before midnight.

The 3rd year of the universe was revealed 5 minutes before the arrival of the New Year (the 4th year of the universe) and the history of human civilization (with written records) began 30 seconds before midnight.

Strangely, human civilization accelerated in the seconds before midnight, at a super-fast rate compared to the previous one, and the population of the Earth increased twofold in the last seconds before midnight.

From the above, it seems that life takes a long time to form and 5 billion years to develop to the current stage of Earth's civilisation. There may be aliens, but they are all at a similar technological level to humans and cannot communicate or make contact between civilisations on the large scale of the universe.

b, there are aliens but they are too far away from humans, the solar system survives in the poor soil of the universe. Ultra-modern civilizations of aliens have no intention of patronizing them.

c. Humans are an ecological sanctuary for aliens, who are observing and studying humans, and so far have not interfered with the human world on a significant scale.

Aliens can observe and study human civilization, but humans cannot reverse the discovery of aliens.

d. Human civilization may be an advanced danger zone for extraterrestrial civilizations, just as human civilization isolated the "SARS" zone during the SARS period.

e. The universe is a hierarchical structure, and the universe may be a system of life. Human civilization is only one particle of the living system of the universe, and the universe has rules that forbid particles to communicate with each other.

f, Russian astronomer Prof. Finkelstein says: "The emergence of life is an inevitable product of the development of complex atoms, and life must exist on other planets, and mankind will discover them in the next 20 years."

g, the human world may be a program, a child is operating the human world as a system on a computer, a system not designed for the existence of aliens.

h, the aliens are out on a trip and humans are tiny creatures living in a home. When the owner comes home, the aliens appear.

i, the aliens are killed by gamma rays, the universe is full of crises and life can be extinguished if you are not careful.

(Will the reunion heroes with their superpowers go beyond Earth to create a world?)

J, aliens who are not afraid to take an interest in human civilization, aliens capable of interstellar civilization, capable of developing consciousness virtual upload technology.

They all live in eternal bliss in a virtual world and are absolutely bored with exploring Earth's civilization, no aliens are so stupid to explore Earth, just design the following program in a virtual world of infinite possibilities ........

The world is too vast, what an amazing brain!