Curiosity can be a dangerous thing
leading to the discovery of all sorts of facts that either challenge
existing beliefs, or for some open the door to knowledge showing the
spectacular and bizarre nature of the universe. Since the European
Renaissance, scientific inquiry has done just that, we've gone from
believing our world is the center to the universe to understanding
that our planet circles an average yellow-star which is on the
outskirts of a boring spiral galaxy lost among trillions of others.
The last real item separating us from
the rest of the cosmos is that we have no idea if both intelligence
life and simpler organisms exist anywhere else. The probes we've sent
out into the solar system strongly suggest the presence of liquid
water underneath the surface of several moons of Jupiter and Saturn
allowing for the possibility of things like bacteria and other single
cell organisms. Many scientists hold out the hope that similar
conditions might exist underneath the surface of Mars, sort of like
underground reservoirs of liquid water protected from the near vacuum
of the surface and the unfiltered UV light coming from the sun. Long
story short, while no respectable scientist will go out and say he or
she is certain we share the solar system with simple organisms, but
they would love to have a more robust space program that would
determine that fact. From what I've read and seen on videos, unless
humans get real stupid and wreck the planet or commit mass suicide we
should know whether or not other life exists in our solar system
within fifty years.
It is the search for intelligence life
where we have little chance of answering that question barring the
interception of radio signals from interstellar or intergalactic
space. Yes, there is a more than zero chance that an alien starship
might just happen to see our little planet and decide to stop by and
say hello. But that “more than zero chance” is so infinitely
small it would be better for the average person to plan on winning
the lotto than expecting such an event from ever happening.
Astrophysicists and other astronomers have made some curious
observations about other stars in the galaxy that right now they
can't readily explain with existing theories causing a few to
hesitatingly suggest the presence of advanced alien civilizations.
The first example is KIC 8462852, which stirred up the media when it was found something was
causing that star to periodically dim up to twenty-five percent
suggesting something really big was orbiting it. Ideas of why it was
dimming an unusual amount ranged from an asteroid field, a cluster of
comets, to debris leftover from the collision of two planets. None of
them really satisfied the observations leaving someone to jokingly
suggest some really industrious aliens were building a Dyson sphere
around the star to collect all that easy solar energy.
With curiosity running at warp speeds,
the Search for Extraterrestrial Intelligence (SETI) guys and gals
began scanning the star looking for radio communications between all
those busy aliens working to enclose the star. None were detected,
but fuel was further added to the possible alien fire when
astronomers looked at the data collected over the last hundred years
or so of observing that star suggesting the dimming has has grown
over that time. The actual nature of this dimming is still unknown
leaving KIC 8462852 to be the subject of continued intense
investigation, although recent ideas put forward squarely put the
cause back into the non-alien induced reasons.
Then there is Przybylski's Star,
located roughly 370 light-years away, is showing seriously bizarre
characteristics that suggest the presence of elements unknown to
Earth or maybe aliens dumping heavy substances into it as a way to
reveal their existence.
From Wikipedia:
Przybylski's Star also contains many different short-lived actinide elements with actinium, protactinium,neptunium, plutonium, americium, curium, berkelium, californium, and einsteinium being detected. Other radioactive elements discovered in this star include technetium and promethium.
In
normal-sized stars like our sun, as it ages and runs low on hydrogen
it gets hotter until it starts fusing its remaining fuel into iron.
While the sun is even now slowly getting hotter when it fuses iron
that when it goes seriously old age and does the expansion out beyond
the orbit of our planet. No real worries though, without humans
screwing things up, we've got about a billion years before the increasing temperature
makes Earth too hot for liquid water and about another three billion
before it gets incinerated.
When
larger stars run out of fuel they go super nova, the temperatures and
pressure involved in those explosions forge all the heavier elements
like silver, gold, and many of the heavy elements being detected in
Przybylski's Star. So, long story short with Przybylski being one
classification bigger than our sun, and because it clearly hasn't
exploded, why it contains those types of elements is quite bizarre.
The
going non-alien explanation is that there is some source, like a
nearby neutron star, feeding the elements into hot plasma that makes
up the star. Another, almost as wild possibility as aliens, is that
Przybylski's Star somehow contains a as yet unknown on Earth heavy
element that is simply decaying into the ones listed above. Once
again, how this unknown element was created without any nearby super
nova remnants is a big mystery.
Just
because when you eliminate all the other possibilities whatever is
left, no matter how improbable, must be considered. The one
explanation half jokingly suggested is that aliens are producing mass
quantities of heavy elements and then feeding them into Przybylski's
Star in an attempt to get noticed by other intelligent species. A
seriously fascinating idea but although, like Carl Sagan once said,
extraordinary claims must come with extraordinary evidence. This
method does seem crazy, but who can tell what another species with
technology far more advanced than our own might consider a good idea.
Realistically,
there is probably a far more reasonable explanation as to why
Przybylski's Star has those wacky elements circulating in its plasma.
For a short time scientists entertained the idea that pulsars,
rapidly rotating neutron stars, might be navigational beacons for
aliens cruising around in their starships. But for me Przybylski's
Star and the curious nature of KIC 8462852 are enough to keep hope
alive that the SETI guys and gals might just have an exciting
announcement to share with the world one day.
6 comments:
We look to solar systems and planets that have conditions similar to our own as being the most likely candidates for life, but I always wonder about some sort of parallel evolution. Life that devloped so differently that maybe it's like trying to use the English language to explain Chinese.
Probably even MORE different than that, actually.
I believe we'll know eventually, as you say. Fifty years? Hopefullymore like 30, so I can see it. When I was in school in the eighties, black holes were only theoretical and we didn't have any proof of planets existing outside of our solar system. We're much better at looking around now!
In fifty years I would hope they have some answers, but like Harry said in 30 at least maybe I can see it also.
I'd like to be around for the answers, too!
Harry: Thirty would be cool, but while congress has mandated NASA send an orbiting probe equipped with a lander to the Jovian moon Europa they didn't really fund the project properly. If it does get funded then there about a decade to design and build it and then wait for the proper launch window. The general time frame I've read about suggests it could be in orbit around Europa in the 2030's, but to me that's a little too optimistic.
Jimmy: Given the attitudes running around Congress, I'd expect the European Space Agency to take the lead in space science. They could answer the question within that 30 years or less time.
Pixel: It totally bugs the living the poop out of me that we don't have a base on the moon and Mars. As for the outer planets, I'm rather pessimistic on getting back there in a reasonable time.
Wow! what a read and video ... Thanx
Glad my life expectancy is shy of a billion years--it's hot enough already!
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