How big is the universe? Is it possible for aliens to exist?

Of course.

It can be said that humans cannot find any trace of the universe. As long as we can find a second solar system, there will be aliens.

It is not possible, but it has already existed.

The universe is big and small without inside. The universe nurtures all things, so aliens must exist.

How big is the universe?

Let’s take an example to illustrate this problem. There are eight planets in the solar system, including the earth, and each planet has its own satellite. The Milky Way where the solar system is located has 200 billion star systems like the solar system. This is like each person on earth is a star system, and the entire earth is less than one-thirtieth of a galaxy.

What’s even more terrifying is that there are trillions of galaxies in the universe.

Finally, let’s talk about aliens. Everyone knows that we are carbon-based organisms, but this does not rule out the existence of other forms of organisms on other planets, such as silicon-based organisms.

There are tens of millions of Earth-like planets in the Milky Way. Even if the probability of existence of life is only one in ten thousand, there are still thousands of planets with life.

Besides, the universe is so big!

So, it is a very selfish statement to say that there are no aliens. The crux of the matter is when will we discover aliens.

The diameter of the Milky Way is 100,000 light-years. There are 100-400 billion star systems like the solar system. The first star system had varying numbers of planets, including terrestrial planets and gaseous planets. . The Milky Way is just a speck of dust in the vast universe. The current range of the observable universe by humans reaches 93 billion light-years, and this range is just the tip of the iceberg of the universe.

Through our understanding of the scale of the universe, we know that there are too many star systems in the universe to be described in numbers, and the number of Earth-like planets in them is also too large to be counted.

In addition, the age of the universe is about 13.8 billion years. In such a long time, coupled with too many galaxies and planets to count, do you think alien civilization may not exist? The possibility that extraterrestrial civilizations do not exist is very small, but the possibility of their existence is very high. Even in a sense, extraterrestrial civilizations must exist. The famous physicist Hawking has no doubt about the existence of extraterrestrial civilizations. However, due to the limited technological strength of human beings, we are not yet able to travel between the stars. Naturally, No extraterrestrial civilization can be discovered.

There are only two ways for humans to find evidence of the existence of extraterrestrial civilizations. One is for extraterrestrial civilizations to actively come to Earth to contact humans, and the other is for us to become interstellar civilizations and go out of the solar system to actively Find.

Endless, the earth is just a drop in the ocean compared to the universe. As for aliens and ghosts, we have never seen them. They may exist, but we cannot prove their existence or non-existence

Earth It is one hundred thousand kilometers away from the moon, one billion kilometers away from the outer planets of the solar system, one light-year away from the outer Oort cloud (one light-year equals one hundred billion kilometers), one hundred thousand light-years away from the Milky Way, and one light-year away from the cosmic web Tens of billions of light years, and the final distance is 100 billion light years from the Uniform Universe (I don’t know how to translate this, Baidu shows the unified universe). This is the farthest distance known and deduced so far! The existence of the earth in the universe is so small that it does not even count as a grain of sand on the beach! So there must be habitable planets and aliens in the universe! It's just that we haven't arrived or can't find it yet

How long time was in the past, and how long it will be in the future. How big the space is. If you understand this, you will know how big the universe is! As long as there is life on a planet with life conditions, there may be aliens! People on earth are not the only ones in the universe, they are just one of them!

The universe created by the eternal God is so huge and boundless. How can we, a small person, be just like a small ant in the eyes of God? It has been proven that God created the earth and prepared living conditions for human beings, such as sunlight, air, water, etc. with suitable temperature, which are not found on other planets.