Since this is a holiday in Japan, I would like to discuss an interesting subject;
"Where is everybody?" as formulated by Enrico Fermi in 1950.
But before giving "my" answer at the end, let's see with a short article what are the current views on this subject.
Scientists Say Aliens Should Have Already
Visited Earth
Authored by Manuel Garcia Aguilar via
TheMindUnleashed.com,
The debate about the existence of alien
life has been a topic that has interested humans for a long time and the
scientific community has had split opinions regarding our solitude in this
amazingly big universe.
Now, new research published in the Astronomical
Journal provides further information that invites us to rethink our mindset on
this topic.
During the summer of 1950, physicist Enrico
Fermi posed a question to his colleagues over lunch:
“Don’t you ever wonder where everybody is?”
He was referring to alien life.
The Earth is 4.5 billion years old, and we
could say that that was roughly the time it took a “kind of life” to be capable
of space travel. Our universe is approximately 13.8 billion years old.
Fermi proposed that during this time, the
galaxy should have been overrun with intelligent, technologically-advanced
aliens. Yet, we have no evidence of this despite decades of searching. This
postulate became known as the Fermi Paradox.
Briefly, some of the main points of this
paradox, formalized by Michael H. Hart, are:
There are billions of stars in the Milky Way similar to the Sun.
With high probability, some of these stars have Earth-like planets, and
if the Earth is typical, some may have already developed intelligent life.
Some of these civilizations may have developed interstellar travel.
Even at the slow pace of currently envisioned interstellar travel, the
Milky Way galaxy could be completely traversed in a few million years
And since many of the stars similar to the Sun are billions of years
older, this would seem to provide plenty of time
Now, you can have a clearer view of why
this paradox is so interesting for scientists and further investigation is
being done, the odds seem to be really high.
The expectation that the universe should be
teeming with intelligent life is linked to models like the Drake equation,
which suggests that even if the probability of intelligent life developing at a
given site is small, the sheer multitude of possible sites should nonetheless
yield a large number of potentially observable civilizations.
This new study offers a different
perspective on the question: maybe aliens are just taking their time and being
strategic.
“If you don’t account for the motion of
stars when you try to solve this problem, you’re basically left with one of two
solutions,” Jonathan Carroll-Nellenback the study’s lead author said.
“Either nobody leaves their planet, or we are in fact the only
technological civilization in the galaxy.”
Stars orbit the center of the galaxy on
different paths at different speeds. They occasionally pass each other, so,
aliens could be waiting for their next destination to come closer,
Caroll-Nellenback’s study says.
Researchers have formulated different
theories trying to answer the Fermi Paradox, including the possibility that all
alien life forms in oceans below a planet’s surface and there’s even the “zoo
hypothesis” which imagines that societies in our galaxy decided to not contact
us to “preserve” us in a way analogical to how we preserve some natural
places—or even to prevent them from getting some kind of “disease” from us.
A crucial fact to this new study is the
fact that, as previously mentioned, the galaxy moves. So, aliens could be
waiting for an optimal travel distance to explore new territories.
“If long enough is a billion years, well then that’s one solution to the
Fermi paradox,” Carroll-Nellenback said.
Another important thing to notice is that
the research team did not attempt to guess at the alien’s motivations or
politics, something that usually delayed the attempts to solve the Fermi
Paradox.
We have to consider also that our
consciousness and our perception of the “civilization” concept may play a
crucial part in this kind of studies. So, our predictions may be based on our
own behavior.
“We tried to come up with a model that would involve the fewest
assumptions about sociology that we could,” Carroll-Nellenback said.
So far, we’ve detected about 4,000 planets
outside of our solar system and none have been shown to host life. But we
haven’t looked that hard—there are at least 100 billion stars in the Milky Way
and even more planets, so we still have a lot more to explore.
Maybe, merging philosophy and science
together for a moment, we could believe that at some point, if there is in fact
alien life out there in the universe, we (or our kids, grandkids, or great
grandkids) will get to know them and make really close contact, assuming all of
this in basis of some of the ideas exposed in Kant’s Critique of Pure Reason,
where he says that if something can happen, and there is enough time for that
to happen, it will happen
My answer to the Fermi paradox:
Here's what we know on the subject at this stage:
- Our galaxy contains between 200 and 400 billions stars (nobody knows exactly how many) and most probably have planets, including earth-like ones in the habitable zone.
- The history of earth is complex with the stabilizing presence of the moon, a low tilt of the orbit and plate tectonic but not improbably strange so there must be many other similar cases.
Based on this alone, it is highly likely that we will find some clues such as the presence of oxygen around earth-line objects with 10 to 15 years.
But what about advanced civilizations. Indeed, why don't we see then? Why are they not here already?
The answer may in fact be extremely simple: Advanced civilizations are like super novas. They explode technologically into something we cannot understand within the blink of an eye due to exponential growth. We can call it a paradigm shift or more likely a phase transition into the unknown.
This may be why we do not see them! They do not travel among the stars and do not colonize entire galaxies. Our universe may be the crib of countless civilizations but as soon as they mature beyond our level of technology, they simply transform into something which is not accessible yet to our understanding.
That I believe is another, more logical answer to the Fermi paradox!
My answer to the Fermi paradox:
Here's what we know on the subject at this stage:
- Our galaxy contains between 200 and 400 billions stars (nobody knows exactly how many) and most probably have planets, including earth-like ones in the habitable zone.
- The history of earth is complex with the stabilizing presence of the moon, a low tilt of the orbit and plate tectonic but not improbably strange so there must be many other similar cases.
Based on this alone, it is highly likely that we will find some clues such as the presence of oxygen around earth-line objects with 10 to 15 years.
But what about advanced civilizations. Indeed, why don't we see then? Why are they not here already?
The answer may in fact be extremely simple: Advanced civilizations are like super novas. They explode technologically into something we cannot understand within the blink of an eye due to exponential growth. We can call it a paradigm shift or more likely a phase transition into the unknown.
This may be why we do not see them! They do not travel among the stars and do not colonize entire galaxies. Our universe may be the crib of countless civilizations but as soon as they mature beyond our level of technology, they simply transform into something which is not accessible yet to our understanding.
That I believe is another, more logical answer to the Fermi paradox!