Where
aren’t they?
Enrico
Fermi once conducted a thought experiment (gedankenexperiment) in
which he found that even with only sublight travel technology, it
should be possible for the first starfaring civilization able to
build more starships at each stop to occupy every habitable niche in
the galaxy in only a million years, which is a blink in galactic
time. His question is, if this has happened, why aren’t we being
visited every day by many of them? The obvious answer is that perhaps
we are, but that we are just not seeing most of them.
So
perhaps the question to be answered is “Where aren’t they?” By
this reasoning they should be everywhere. The Universe may a very
crowded place. Forget the vision of the galaxy as a largely empty
wilderness or frontier. It is more than likely to be filled, largely
with beings having a common biological origin. I call them
“exotribes”, or exos, to consider that they may not have a strong
connection to a civilization, as such, except what they can carry
with them.
FTL
The
most promising approach to FTL appears to be the Alcubierre-Froning
drive. It would enclose the travelers inside a space-time bubble that
would glide across a warp in space-time like a surfer on a wave.
There would be no motion through space as such, but the bubble would
move, which could be at a much higher transport rate (not ”speed”)
than light through a vacuum. The bubble would protect occupants from
debris and radiation, and would maintain gravity and the ship clock
as of the point of departure. Transport termination is by collapsing
the bubble. I call such vessels “jumpships”, and their drives
“jumpdrives”. They need not use the Alcubierre-Froning
technology.
The
great challenge is maneuvering thrusting. Hopes are to extract enough
energy from the vacuum field, and there are efforts, the so-called
“em” drive, has might approach this.
Back
in time
A
jump is not just transport in space. It is also transport backward in
time. Assume, for the sake of argument, that the transport rate is
100 times the speed of light, or 100c, and that the target is 50
light-years distant. That means that from the viewpoint of an outside
observer the trip takes only six months. But when it arrives, it will
find itself 50 years back in the past. How is that determined? Not by
reference to the ship’s onboard clock, which maintains the time at
the point of departure, but by reference to a “standard clock”,
one of the most convenient of which is a neutron star, which are
plentiful in the galaxy, and once created, spinning. They slow down
at a more less fixed rate due to loss of mass and spin angular
momentum by emitting gravity waves. By measuring the spin rate just
before departure, then again after arrival., the travelers can get
the amount time they have gone back, which would be 50 years in this
example.
When
you look at the night sky, you are seeing objects not as they are
now, but as they were hundreds, thousands, or perhaps billions of
years ago. If you jump that distance, say, 50 light-years, you are
also going back 50 years in time, from the perspective of where you
left. That also means you cannot return to the time of your departure
that way. To return 50 years you just have to wait for 50 years to
pass, or engage in accelerative transport, which is hazardous without
shielding.
When
a jumpdrive bubble forms, it captures the gravity/acceleration at its
point of departure. When it arrives and the bubble collapses, the
traveler is subject to the gravity/acceleration at the point of
arrival. If points of departure and arrival are not chosen carefully,
the traveler may find himself in crushing gravity, or flung off into
deep space at a high speed. He may even find himself on a collision
course with a massive object.
For
most voyages it may be unwise for jumpdrive users to venture far,
usually not more than 200 light-years. The uncertainties of farther
voyages may be too hazardous.
Communications
among outworlders is also a problem. If a jumpship traverses 50
light-years, it arrives 50 years in the past of its point of
beginning, as seen by observing “clock” stars like rotating
neutron stars, whose spin period slows at a steady rate. At that
point, -50+δ, it
can send a light signal, at the speed of light, back to its home,
whose year is set at 0. Which arrives 50 years after the year at
which it was sent, from what is now a new outpost. The light signal
would arrive home at about 50+δ
years at its home, where δ is
the increment of time spent preparing the signal. From the standpoint
of home, that is close enough to instantaneous. Only 50 years late.
If the home then sends instructions, by jumpship, they arrive shortly
after, -50+2δ, when the light signal was sent from the new outpost.
Not instantaneous, but with more than a 50-year time gap. Not
real-time.
To
view the future of some world, someone on, say, the homeworld, would
have to traverse to some point, say 25 years in the future of the
target world, and use telescopes to view the target world. The images
could then be sent, say, to the homeworld, which could view the
future of the target world from -50 years to – 25 years. Hose
images could then be shared with other expeditions, including those
to -50 year expeditions. They could see what would happen, but not in
time to prevent anything.
Each
journey back in time makes some changes. Each of those changes
creates a branch of the timeline, which I call a “diaverse”.
Diaverses can be few and similar. They can be very different. They
can also reconverge, in points that share different pasts and the
same future. Too many jumps can create a plethora of conflicting
timelines, that may sometimes need to be repaired to reduce the
confusion. There may be exotribes that can move between diaverses,
what I call interdiaversal transport. Perhaps making “repairs” to
them.
Creators?
Some reported conversations with exos
show they seemed to have reverence for what might be translated as
“creators”, with no information what they might be.
In our future it seems likely that
some of us will genetically engineer some of the more promising Earth
species, like bonobos, octopi, parrots, ravens, dolphins, or some
reptilians like geckos to have human-level intelligence, then seed
them on suitable planets we might find. Their descendants might now
be visiting us, seeking their origins. This could explain why they
don’t disclose themselves. Their creators may be us, and they may
not want to disturb their own creation.
Civilizations?
People seem fond of imagining every
exo ship is a voyage of discovery representing a “civilization”
much like our own, a large society with many members, perhaps
occupying many planets. There may be such societies, but it is
unlikely any visiting ship “represents” any of them. Ships may
originate that way, but it is likely they are long cut off from their
origination world. They may carry their “culture” with them, but
that can be done in holographic records, a small one of which could
carry everything notable about them. They might try to send signals
back to their origin, with no way to know if they had been received,
or whether there was anyone to receive them. They would themselves be
an outpost, a detached colony, that might stop at a suitable
location, or proceed onward. If one stopped, it would likely be at a
site with enough resources to sustain them until it was time to move
on. The most likely such locations would be planemos, rocky planets
with a hot core, not bound to any one star. Hey would burrow into it
and extract energy from the core.
That is why I call exo visitors
“exotribes”, because they do not represent vast civilizations.
‘
Pileup
in the past
If each jump generates another
(nested) diaverse, and the number of jumpers are always growing, it
would seem that the diaverses would pile up at the center (origin) of
the Universe, at which point one might expect them all to converge at
once, and trigger another Big Bang. Instead of one Universe stemming
from one Big Bang, There could be countless number of new universes
being created every moment, each expanding toward infinity. Each new
universe would clean the slate of diaverses, and begin generating
many more. Exos, including us, may be continually driving the
creation of new universes.
1044
New universes a second?
The
most plausible rate of creation of new universes would be one on each
Planck unit of time, which is 5.39 × 10 −44 s. Rounding
off, that would be about 1044 Big Bangs a second, since
forever. Each Big Bang would start time for that universe, from the
viewpoint of an observer inside it, which would tend to think there
had only been one Big Bang, and there had been only one, from its
standpoint. Each would expand into oblivion.
Souls
When
we search the stars of our galaxy, what are we looking for? Mostly
Earth-like worlds with dry land masses, abundant fresh water, mild
climates, moderate daily and seasonal weather changes, Earthlike
gravity, fertile soil, and not too unfriendly natives. In other
words, a frontier like that of North America in the 19th
century. When we contemplate settling Mars we dream of terraforming
it so we can walk around on its surface without protective suits.
Leaving aside the unlikelihood of finding such a world, would we
really want to settle its surface the way we settled North America?
The answer is probably not. On Mars we plan building habitats under
ground, protected from environmental hazards, with a life support
system that does not depend on surface conditions. Should we plan to
do anything else wherever we go? No.
It
is likely those are the same choices any visiting exos would have
been making for a long time. Surface living is not that desirable,
even if available. Surfaces might be pretty to look at, and local
lifeforms might be interesting to study, but that is a matter of
esthetics or curiosity, not economics, and it is likely exos would be
making economic decisions.
The
persistent question concerning exos is what do they want from us or
from our world? It is too easy to assume they are like us, with our
ambitions and values. Apparently they are not. If they were we would
have grounds to worry. Our treatment of other peoples on lands we
visit has too often not been admirable. It can’t be energy or
minerals, which are widely available at many places from which it can
be more conveniently extracted. About the only thing that might be
found here would be miniature black holes, but we have no evidence of
their existence or their presence nearby.
It
seems unlikely that they would need our world for food, unless they
enjoy the thrill of the hunt and the taste of fresh game. If they
wanted our bodies, we would notice that. No, it seems more likely
they would collect some essence of us, perhaps what we call “souls”.
There
has long been speculation concerning whether we, or some of us, carry
a soul that could survive death. There are reports of remembering
past lives, or of having “near death experiences.” But what could
a “soul” be? Intelligence seems to be carried by the neural nets
of the brain, perhaps enhanced by quantum entanglement, because
intelligence seems to propagate genetically. But if the brain is the
orchestra, perhaps performances of it can be preserved like sheet
music, or a hologram of performances. This might be transferred from
vessel to vessel as what the Vedics called akashik records.
Can
such records persist without a vessel, the way sheet music can? If so
then perhaps what exos are collecting are records of memories,
feelings, or characters we call souls. Clearly they are some kind of
artifact. They might play them for entertainment, or use them as
money to buy things they want. The noble souls of more spiritually
advanced beings, might have a higher value. On the other hand, so
might the sordid souls of evil beings. Evil can be more entertaining.
Our tribe could certainly provide plenty of each.
Exo
conformity
Reports from alleged contactees
indicate the behavior of exos is extremely regular, either because
they are under tight control, or because their design prevents them
from deviating from a norm. There are no criminals, no cheaters, no
miscreants, no psychological deviants, no eccentrics. But also no
comedians, no creative artists. They are much like social insects,
which are generally siblings, acting in concert not under central
control, but as emergent behavior of a swarm, responding to ques from
nearby individuals, but not centrally directed. Such conformity can
be a strength for an army, but not for individuals operating
independently, or taking leadership roles not assigned by the group
as a whole. For us diversity of talent is strength, for theirs
perhaps a weakness.
They seem to have more in common with
social insects than with human Terrans.
There is also a view that other
civilizations will be millions or billions of years more advanced
than our own, as though the rapid progress that has been made over
the last century could be extended indefinitely. That is unlikely.
Scientific and technological progress is like mining. There is only
so much to find, and when it is, progress will not move far ahead,
but settle on more accessible things, like biology or history. Such
progress is an investment, made in the expectation of a return. That
is also true of progress in individual intellectual development. We
imagine exos to be superior to ourselves, in every way. In fact many
humans today may be as intellectually gifted as any exo.
So forget “Type I”, “Type II”,
or “type III” civilizations. There probably are none. There may
no return on that kind of investment. No Dyson spheres.
In
the movie Forbidden
Planet
the inhabitants, the Krell, made a stupid mistake that a human
college student would not make, of not testing a new technology
before putting it into widespread use. (Humans sometimes make such
mistakes, so it can’t all be blamed on one stupid civilization.)
So the best of the exos may not be
advanced far beyond the most advanced humans.
This may also be the result of exo
groups being so small. It may take many more before creative
individuals or comedians become manifest.
Thralldom
One of the most disturbing aspects of
reports of contact with exos is the way they can control our minds,
making us their puppets, for their purposes.
For their purposes.
Of what avail is the technology of
starflight without the technology to resist mind control? Is there
one master exotribe that rules them all? Or are some able to maintain
their independence? We want to be one of those. Else it is all for
naught.
We also do not want humans to have the
technology of mind control over other humans. Independence is for
everyone.
Do some exos see us as a threat,
because of our warlike ways? Enough of a threat to resist our
venturing into the galaxy? Those warlike ways can also be a force for
liberation, which may be the greatest threat of all.
Space
Force
Proposed
by President Donald Trump to become a new service branch, alongside
the Army, Navy, and Air Force.
Mission,
dominate Earth: Nuclear missiles (mow restricted by treaty), kinetic
projectiles (not restricted), beam weapons, reconnaissance (Might
adsorb National Reconnaissance Office).
Mission:
External threats: Asteroids and comets, exo invasion.
Mission:
R&D: Get supervision of advanced research, especially top secret
special access projects TSSAPs) , gradually disclose results.
Summary
The
issue of FTL taking travelers back in time has been addressed by
theoreticians like Alcubierre, but none of them seem to have thought
through the matter from the viewpoint of travelers.
Notes:
-
“Diaverse”, from the Greek, diakládosis (διακλάδωσης) in which the prefix diaklád- emphasizes its branching structure. “Verse” comes the Latin “universum”, which is mixing linguistic roots.
-
Kinetic bombardment. First proposed by science fiction writer Jerry Pournelle, and known by different names such as Project Thor, involves bombarding Earth with non-nuclear, non-steered ballistic projectiles about the size of a telephone pole, composed of a heavy material like tungsten, which on impact would produce about as much damage as a nuclear blast, but without the radiation or stigma of using “nukes”. It would be effective at destroying deep installations such as the Iranian nuclear base of Fordow, southeast of Tehran.
The method, using meteorites, was used in a science fiction movie, This Island Earth, about bombardment of a planet, Metaluna, by a race called the Zagons. Defense was done with an “ionization layer”, until the projectiles broke through an incinerated Metaluna. Also in the movie was an example of a mutant slave who turned on its masters as destruction was imminent