Why does the Universe make contact with extraterrestrials almost impossible?

 Perhaps there are no extraterrestrials. Or so few and so far away that no contact is possible.

Traveling to the stars is a physically impossible task. The distances are so enormous that we should abandon that idea.

It is said that the Viking space probe has left the solar system. But that's not true. It's completely false.

It hasn't yet reached a distance of one light-day. The dwarf planet Pluto is about 5 light-hours from Earth. The probe has traveled 5 times farther. And it was launched in 1977. It has been on its journey for 49 years.

But the Solar System extends to the Oort Cloud. A shell formed by trillions of icy bodies that are almost motionless. This shell, which marks the boundary of the Solar System, is located 1 light-year from the inner Solar System. That's 365 times farther from the current position of Viking 2.

And the next closest star, -Proxima Centauri- is more than 4 times the distance from the Oort cloud.

It's not foreseeable that any invention will allow us to reach the stars, even on journeys of thousands of years. The stars are simply beyond our reach.

Long-distance communication would also be nearly impossible. Communications would take place at the speed of light, but unless our hypothetical interlocutors were in our immediate galactic neighborhood, we would have to wait thousands or hundreds of thousands of years for each connection.

The SETI Project has been searching for radio emissions from stars in our galaxy since the 1990s, looking for extraterrestrial civilizations.

The conclusion is that, unless we're missing something, there could be 3 or 4 technological civilizations in our galaxy, at most 12, or even none at all. We might be alone.

There has been a total lack of evidence of intelligence in the signals received from the many millions of stars analyzed.

Of course, it could happen that there were civilizations, but that they were hiding.

Also, that they had discovered a previously unknown form of communication.

But it is most likely that Fermi was right, and the evolution of intelligent life would normally end in a singularity of self-destruction.

Whether we are alone in the universe, or knowing that others may destroy themselves and not survive their technological civilizations, it should make us realize how important our existence is.

Human beings have developed a technological civilization by taking advantage of a favorable climate over the last 12,000 years.

We should achieve a firm union of all human cultures, and with Science as our ally, prepare ourselves for the climate changes that our wonderful Earth will undoubtedly experience in the near future.

We must take care of our home. We have nowhere else to go.

Greetings.

Our only home.

Why haven't extraterrestrials contacted us?

 Because we don't know where they are.

I'll tell you something that few people understand: the galaxy is fucking enormous.

No, not big, what's coming is six towns and a mountain behind it—"fucking enormous." The true scale is "understood" by few people who think it's some kind of neighborhood and that the stars are right next door.

Let's assume, just for the sake of argument, that there is one extraterrestrial civilization for every 100,000 stars, and to avoid complicating things, only in this galaxy.

The exact number of stars in our galaxy is still unclear; estimates range from 100 billion to 400 billion stars. Let's go somewhere in between and say 250 billion stars, just to pick a figure.

This would give us, again just speculating, 2,500,000 civilizations. That's a lot, man... I'm sure not that many because the stars in the central regions don't look very friendly, but hey, it's just numbers, it doesn't matter.

Now comes the interesting part: even with so many stars, it's still only one star for every 100,000, and stars are incredibly far away. Galaxies in photographs appear to be "full of stars."

Yes, there are many stars, but the space between them is immense. Just think, light takes more than four years to reach the nearest star to the sun. Four years, and that's light!

Now take those 2,500,000 civilizations (an arbitrary number chosen at random, remember. There could be more or much less) and eliminate those with a primitive technological level, those we cannot understand, and then see how you communicate with them.

By radio?… good idea, but how do you know they'll use that method and not something completely different? It could be that highly advanced civilizations use another method, like gravitational waves, and we can't detect them at that level yet. They might use forms of communication unimaginable to us, they might be sending signals and getting confused by other things, many of them might simply not be interested in talking to anyone, and again: the galaxy is enormous.

We won't even talk about communicating with other galaxies; it would take billions of years to say "hello, how are you" and receive a response.

And visiting them with spaceships?

Okay… do ships that can exceed the speed of light exist? As far as we know, that's purely theoretical, and even then, do you know how many stars there are to look at?

Imagine a fleet of 1,000 ships visiting one star per year. You would need roughly 250 million years to visit all the stars in the galaxy.

Even in "Star Trek" there aren't fleets of a thousand ships, so do the math and you'll see that it's not nearly as simple as that.