Is there life on an alien planet?

I have been engaged in astronomy science for 6 years, and now your question.

First of all, "the existence of extraterrestrial creatures" and "extraterrestrial creatures come to Earth in flying saucers" are two completely different concepts that must be clearly distinguished.

Almost all mainstream scientists are serious about the existence of extraterrestrial life (bacteria count) for the simple reason that the universe is very large and there are so many planets suitable for life to live and produce. So the existence of extraterrestrial life is almost certain, but almost all mainstream scientists also believe that it is almost impossible for aliens to fly flying saucers to Earth because they are too far away. If you don't admit this, please go and study high school physics.

Anyone who advocates aliens flying saucers to Earth can only be said to be science fiction enthusiasts. Lack of basic knowledge of astrophysics and physics.

And then there's the heart of the matter: why should we explore extraterrestrial civilizations when it's impossible to visit each other?

Remember that exploring extraterrestrial civilizations and exploring extraterrestrial life are two different concepts. Be sure to distinguish clearly.

Efforts to explore extraterrestrial life have never stopped, mainly targeting several planets in the solar system, with the aim of finding out if there are other forms of life than life on Earth. For example, if there are extreme lifeforms that can survive without sunlight and water.

The exploration of extraterrestrial civilizations is more philosophical. Humans wonder if they are intelligent, or if so-called socialization is an evolutionary necessity. In other words, is the emergence of a well-developed brain and a high degree of social civilization a necessity for all evolution, for example, if a planet is dominated by insects, will there be a high civilization that is completely similar to human society, or will it act on instinct like a giant honeycomb?

Will there be love on this insect planet? Will there be writers? Will there be poets?

Will there be a painter? However, as mentioned earlier, even if there are two highly developed civilizations, because the distance between the planets is too far, it is impossible to visit and communicate with each other, so the main work of exploring extraterrestrial civilizations is still at the theoretical level and the basic technical level.

Whether the so-called human beings are lonely or not is not whether there are bacteria on the alien planet, but whether there is a highly prosperous intelligent life like the earth. If you still don't understand, please ask, I will do my best to answer.

One more thing to add.

Exploring extraterrestrial civilizations has nothing to do with immigrating aliens, and so far, no planet has been discovered that can be inhabited. The only planet in the solar system that is a little more reliable and has the possibility of immigration is Mars. But it will take at least 500 years to transform the living environment on Mars.

Even if the transformation is complete, humans can only live in a completely closed environment. The large-scale immigration of earthlings to aliens can only exist in science fiction in the past 1 or two centuries. Of course, the creation of a small moon city by a small number of elite astronauts does not count.

Strictly speaking, there is, but people have not yet discovered that the universe is vast, and there may be a planet with a similar environment to the earth, and it is also very likely that life will occur.

No, I haven't heard of it yet.

Scientists in the United States have discovered that there is water, but they do not know if there is life.