How big is the chance that life exists outside the Earth?

That depends on how big the universe is. In An infinitely large universe there is also an infinite number of planets with life like on Earth.And that has to do with probability and large numbers.

If the chance of life is extremely small, and the fact that we exist means there is a chance, there is a chance that more life in the universe is present. Is the opportunity e.g. 1 on 1 billiard per planet and there are a billiard planets then there is a good chance that next to our planet there is still another planet with life.The problem is only that we do not know how great the chance of life is and how big the universe really is.

But not only is the universe huge, it cannot even perceive the majority of it, let alone investigate.We do not even know if there are forms of life on other planets within our own solar system, although that is very unlikely. Venus is equipped with a dense atmosphere and we can hardly get through it. The discussion about life on Venus is still in full gang 鈧?娄

Mars is another contender but we already have some robots driving around that have taken measurements.Probably there is no life on Mars, but that used to be quite different.

Jupiter and Saturn are gas giants and here too we do not know what exactly is happening within its atmosphere.

And although Uranus is not a gas giant, this planet also has a considerable atmosphere consisting of methane.Voyager 2 is the only space probe that has been somewhat near Uranus and has found rings around the planet, as is also the same for Jupiter and Saturn. And Neptunus is also somewhat similar to Uranus and also has rings!

In short, yes!There is a chance that there is more life in the universe. Unfortunately, we cannot estimate how great that opportunity is. The only thing we know is that if the universe is infinitely large then the probability of more life in the universe is also infinitely large.

If the universe is not infinitely large, then it has a border somewhere where everything stops.What the shape of that edge is then again is also hard to say. Probably like a ball.

What makes it even harder is the fact that Voyager 1 was launched in 1977 and is now 22 trillion KM away from the earth. A light year is about 9461 trillion KM so that means light from the sun Voyager still reaches within a day!In short, we are still not far away from our planets…

And what we observe further in the universe lacks a lot of details and runs far behind in time.Light of a planet at 5 million light years away gives us a glimpse at the history of 5 million years ago. If life is visible, then that is also 5 million years ago and much can have changed.

In short, we still know too little to answer your question…

Organic-chemical substances occur in the universe.In this situation, simple life will be able to arise elsewhere.

There are also researchers who, based on the complexity of DNA, believe that life must have arisen rather than the Earth’s age.

(Source: Researchers use Moore’s Law to calculate that life began before Earth existed)

Intelligent life, on the other hand, is rare.

Just look at the history of the Earth.

The Earth is 4.5 billion years old.

Man only 2.5 million years.

That is not yet 0.05% of the history of the Earth.

Single-celled and very primitive life for a long time the only thing that lived on the earth.Then it took a considerable time for multicellated life appeared.

The emergence of intelligent life seems to mean that circumstances are needed for the evolving of intelligent life that is not self-evident.

This probability is measured to the extent of the universe quite large.Many times bigger than that one will ever win the postcode lottery. Nevertheless, many do not put their money on the postcode lottery. So why would one use his thoughts on the chance that there is life in the cosmos, possibly so far away that you will never be able to perceive that anyway and thus always remain only a chance ?No chance says anything about reality.

We do not know that.We simply do not have any comparison parameters to calculate this.
To be aware of the likelihood of something, we need to know the variables.We must be able to compare. But since our Earth is the only planet with life we know about, we cannot calculate probabilities.

Now, given there are billions of planets in our Galaxie alone, I think we are not alone.The question is: will we ever find one another?
And then I think: no, most likely never.

A book on statistics (forgotten which) gives the answer:

  1. There are 2 possibilities: there is no extraterrestrial life.

If we have no better proof, then both possibilities are equally probable. The probability is therefore 50%.

  • There are many different possibilities: either there consist 0 aliens, Hab there lives 1, ofwl there are 2, Hab 3, and so on.
  • If the universe is infinitely large, the maximum number of aliens is also infinite. The requested opportunity thus consists of all possibilities with > 0 Live wzens, thus practically 100%.