The search for extraterrestrial life elsewhere in our universe has taken many forms, from the radio signal searching undertaken by SETI to the rovers and probes deployed elsewhere in our universe. But if it's intelligent civilizations we're looking for, say a couple of Harvard and Princeton researchers, we can likely find them just by literally looking for them. Alien civilizations that evolved in the light from their own stars would likely artificially illuminate their cities, and we should be able to find them by looking for illumination on the night side of exoplanets.
In a paper available on arXiv, Abraham Loeb of Harvard and Edwin Turner of Princeton point out that it's entirely plausible that other alien civilizations, if they exist, would artificially illuminate their spaces just as we have. And if they have, this light will be distinguishable from natural illumination, even at astronomical distances.
A planet orbiting its star will reflect back natural light from its star in predictable ways as it makes its way around its elliptical orbit. But measurements of artificial light would remain relatively constant. So a planet with no artificial light should return measurably different changes in light than a city that is well illuminated.
Loeb and Turner admit that this is an imperfect way to hunt for alien civilizations at a distance--the method more or less requires that the brightness of the day side and the artificially illuminated be somewhat comparable. That's not the case on Earth, and would likely not be the case on alien planets. But the technique is a starting place from which future SETI strategies could be developed.
And besides, for objects closer to our own solar system we wouldn't even have to rely on light measurements. Our best optical telescopes could spot a Tokyo-scale city on another planet or asteroid at up to 50 astronomical units from Earth. That means we could actually see a Tokyo-scale city as far out as the Kuiper Belt without resorting to mathematical tricks.
I read this several places over the weekend and I keep wondering why this is a new idea. I always thought since I was a kid that this would be the obvious way to find another advanced civilization. I guess I assumed scientist would think it obvious as well.
well what if they're alien dwarves that live below the surface???
not every "artificial light" is a light from "intelligent creature", here on earth, there are lots of animal and plants producing light. there are also chemical that can capture light..
given our very limited telescope technology, there is no way, we can determine anything out of that (a small spot of light, from a distance planet)..
a plant, animal or a volcano? or a unique river or chemical?
who can tell?
Our earth has natural static energies that flow with the minerals of the earth and rising and falling of the sun, also the rising and falling of tides and well as the act of flowing water.
This that little fact together with 3 pyramids in the same shape as the Orion system, coupled with their internal design being of a function nature and (zero, none) mummies ever being found inside them and the interior void of any type of symbols\hieroglyphics with the final addition originally the Nile used to run right next beside them some 3000 years ago (Flowing water of the Nile and the annual rise and fall seasonal flooding of the Nile.) and you have 3 light bulbs shinning to the stars with the rest of the earth not being light and it’s like showing to HOME, here were are, your reflection, come to us, rescue us.
The tools and skills of the local people could not make the pyramids on their own and they had not the lifting power to move some of the stones. Added to the fact, if you are going to build something, why choose the hardest possible way to do it; it illogical.
If the knowledge and skill and tools were common to building the pyramids, like any good carpenter of today and mansions, they build similar objects at home and create their own business and build them elsewhere. This did not happen.
The aliens phone home with their 3 pyramids, were rescored and picked up their tools and left.
The only thing the aliens left us earthlings some language, some culture, calendars, some objects pointing to a particular place in the sky, nothing more.
Yes, I agree, use a light bulp to see and be seen!
This is a news story?
"Loeb and Turner admit that this is an imperfect way to hunt for alien civilizations at a distance--the method more or less requires that the brightness of the day side and the artificially illuminated be somewhat comparable. That’s not the case on Earth, and would likely not be the case on alien planets."
Translation: Here's something we thought of that won't work.
Maybe PopSci can write an article on my "invention" - water-powered cars. You just have to add a whole bunch of gasoline to the water.
This is assuming that they would see light in the same spectrum that we do. Also, some animals have evolved to not need artificial light or light at all. Why are we not assuming this could easily be the case? I highly doubt another intelligent life form would have evolved in the same fashion we did. People seem to forget that the slightest deviation in history could provide an entirely different result.
Let's keep our minds open to other possibilities...
How so like us to instantly assume that advanced beings would artifically illuminate. What if they were advanced bat like lifeforms with no need for night time illumination? What if they posses eyes suited for dark enviroments and sleep during the light hours? or what if they don't have eyes at all?
Granted, with the million billion trillion planets out there, a few might have evolved similarly to humans. But lets not hang our hats on just one hook!
Playing Devil's Advocate since 1978
"The only constant in the universe is change"
-Heraclitus of Ephesus 535 BC - 475 BC
@Geewillikers, according to main line Egyptologists. The Great Pyramid was constructed in 20 years. However if you take into account the pyramid is built out of megalithic stones weighing 3 – 70 tons, you would see that this is impossible. If a stone was put in place every 5 minutes it would have taken over 100 years. Are we to believe these people who only had copper tools and no concept of the wheel apparently, placed megalithic stones with that kind of precision at less than 5 mins per piece??
Not saying Aliens built the pyramids, but modern science cannot explain how the pyramids were built.
My thoughts exactly. But it would still be awesome to find a planet covered in glowing things.
-Spouting a fountain of nonsense since 1995-
If this ever got off the ground it could probably be augmented with other detection techniques like looking for the tale tale markers of mining on asteroids etc. I think it was PopSci who had an article a while back which discussed looking for ET's this way. We'd use spectral analysis to look for chemical markers that might be synonymous with mining operations. We haven't evolved to the point of mining our solar system yet, but its reasonable to suspect other species have.
Don't take life to seriously! You'll never get out of it alive.
I don't think we should look for aliens with similair resources as we. that would lead to wars. We need to find aliens unlike us, that uses darkness to survive.
LIKE INSIDE EUROPA OR OTHER ICEY MOONS WITH OCEANS
Wouldn't the light take forever to reach us? By the time their light reaches us, a distant system/planet with a civilization could be there one minute, and gone the next by the time we receive a clue to their existence. Correct me if I’m wrong. Light isn't instant, you can't see the light bulb turn on the moment its switched at 100 billion miles away.. Though if you did catch a glimpse at a planet with "city lights" at least you know someone was there.
This is going off of the assumption that aliens are like us... which is very, very most likely not the case.
Aldrons Last Hope,
Some alien culture with the science, skills and knowledge traveled to earth. We all know how vast the cosmos is and so this skill had to be greatly advance. With skills like this we may assume they could do other great scientific things, live a long time, travel about our planet easily and so on.
So, something forced them to continue staying here that was out of their own control.
So us humans being religious since forever, they worked with the locals, they taught them things, simple things. As they use their really advance technology and the locals having a limited vocabulary to described it, saw it as GOD like behavior.
These aliens inspired the locals to work for them. So now we have one giant happy working force with advance leadership. By the way, the Egyptian culture back then had peace in that region for a long time.
The same type of copper tools the Egyptians have been made in test and use to bang on granite and other same type of minerals they used for the pyramids. Each tool point last about 5 or 10 minutes. It did not work so well. Now to mention the granite stones inside the 3 great pyramids are made to perfect calibration, that is even extremely hard for us to do today.
The granite inside is conductive. The outside stones that used to cover the pyramids were of a different type of mineral and rather insulated type. It has been proved by engineers already the thing back then with the Nile locally running close with it water would charge the whole place up, statically.
These local Egyptians made calibrated monolithic granite stones by hitting them with soft copper chisels by hand, lol. No way and moved them about and set them in place with precision too. We are to believe they had this ability and poof, the technology was gone. Naaa, that in itself is unbelievable.
We humans are a lazy bunch of geniuses. We create tools so we can do more with less effort. If we can move around a few tons, 70 tons or several 100 ton stones, why wake up tomorrow and forget how it was done. It was said; many 100s of Egyptians moved the stones. Ok, then it was not just one guy with the knowledge. They all knew it right? But in fact that was not true. What they did not know and we currently do not know as of today was what ‘other technology’ that was being applied by the aliens helping to move the giant granite stones. The aliens took that piece of technology back with them.
To put it best, if 3000 years ago, I showed up with my computer and my printer and typed and printed out a 1000s document to Egyptians and then packed up my computer and printer and left the documents with the all the Egyptians, they would not know how to make a computer, just because I left behind the paper documents.
Sure, I left them with the ability to read, but that’s where the technology would end.
The Egyptians did have their religion and it was abundant, on the outside of the 3 great pyramids. The aliens could care less of it. But they used it in keeping the locals happy.
@ ALH " no concept of the wheel apparently"
" could be there one minute, and gone the next by the time we receive a clue to their existence"
light won't speed up it will just be billions of yrs late, the evetns we see in the stars happened when dinosours walked the earth
Oh, if you make one group on Earth really advance and forget the other cultures, then you change all the Earth unfairly. This is why we have much the same technology of pyramids, monolithic stones, calendars, star charts, language, math, and writing all over the earth. Those aliens were fair in how they influence the Earth as a whole. All the other oddness around that technology was just our local customs and religions being applied to it too.
1) The Unfinished Obelisk, Aswan, Egypt. - Measures 120-feet (42m) and would have weighed over 1,168 tons when complete.
Ref: (Sci. Amer. Dec. 1977. No. 36). - Estimated @ 1200 tons
This incredible stone is more than twice the size of any known obelisk ever raised. Quarrymen apparently abandoned the obelisk when natural fractures appeared in its sides. However, the stone, still attached to bedrock, gives important clues to how the ancients quarried granite. Much of the red granite used for ancient temples and colossi came from quarries in the Aswan area (500 miles south of Cairo). The Unfinished Obelisk still lies where a crack was discovered as it was being hewn from the rock. Possibly intended as a companion to the Lateran Obelisk (see below), originally at Karnak, now in Rome.
A few wheels, logs, ropes and several 1000s locals could never move a stone like this.
Why even attempt such a project in the first place?
Unless you knew in advance you could move it.
Where did the 'other techology' go?
Humans have only lit cities for what? A hundred years? And a thousand years from now will humans still have cities that are lit? Ten thousand? A million?
We need to focus on things that would last for a hundred million years or more, the chances of the first alien life found being within a millenium technologically of us is virtually nil.
With all our technology and satellite dishes pointing to the stars and our present day scientist that say it is so likely to find intelligent life in the cosmos, we cannot believe we were visited by aliens 3000, 5000 or more years ago?
Research just one thing; “How to carve precisely one 1200 ton stone, convince a bunch of people to do it with you and believe it can be done, and moved it to another great location with several thousand old technology.
Research our ability to do it with current technology. How would find a group of people today to do this project?
Before this kind of project could even begin, you must possess the ability to do it. You must have the confidence of that ability.
We have the Hubble Telescope. Yes, the aliens that have the technology to cross the vastness of space, also in the Orion belt have the technology to see 3 statically glowing pyramids in the darkness of Earth 3000 years ago. It is not unreasonable.
If the Dark Aliens are need for darkness, they will take and horde all the dark matter in the cosmos. Have you read how much dark matter there is in the cosmos?
GEEZ! MAN! We have to go war now!
Your right! Those aliens maybe not see or not even looking at all the lighted stuff in the COSMOS.
Dark matter is believed to constitute 83% of the matter in the universe.
Why take a crumb, when there is so much cake!
They want the dark matter!
It’s WAR I SAY WAR! Gurrr!
Of course, how do we defend something we cannot find or see yet? I get back to you.
@Aldron's Last Hope: "according to main line Egyptologists. The Great Pyramid was constructed in 20 years. However if you take into account the pyramid is built out of megalithic stones weighing 3 – 70 tons, you would see that this is impossible. If a stone was put in place every 5 minutes it would have taken over 100 years."
Just did the math with this handy thing called a calculator, and a quick google search. 2.3 million stones, at 5 minutes per stone yields:
2,300,000 * 5 = 11,500,000 minutes.
11,500,000 / 60 = 191,666.667 hours
191,166.667 / 24 = 7,986.112 days
7,986.112 / 365 = 21.88 years.
So if stones were placed every five minutes, then it could be accomplished within a ~20 year time frame.
That aside though, it's still astounding the amount of work that was done to create the pyramids.
@Ianredneck, according to main line Egyptologists, the WHEEL, was introduced to Egypt about 1600 B.C (3600 years ago) through foreign invaders in the form of chariots. The Pyramids are given a build date of about 2560 B.C (4,500 years ago) You can find this info in any main line book about ancient Egypt or even Wikipedia.
So again, are we to believe that the culture that made the pyramids had no concept of the wheel??
@GeeWillikers, there is no way that the Pyramids were built the way described in textbooks, it’s just impossible. That being said I don’t believe it was built by Aliens either. I think that Ancient humans (10,000 B.C ) were far more advanced than we can imagine. They built the pyramids with knowledge we have yet to discover.
Some quick facts about the pyramids,
The 4 points match the 4 cardinal points within 1 minute of arc
The base of the pyramid is 13 acres yet the most it deviates from one corner to the next is ¾ inch (over thousands of years)…this is more precise than anything we can do today.
The ratio for height to width is exactly pi 3.14
There are so many things encoded in the pyramid, from pi, to the golden ratio, to the actual size of the earth in relation to the sun and the moon, and we are to believe these people had no concept of the wheel??
The pyramid and the Sphinx shows water damage on its sides. Last time the Sahara desert had that climate was 12,000 years ago. Geologists have proven that the Sphinx has sustained water damage sometime in the past that is consistent with heavy rain.
Egyptologists have it all wrong and are spreading lies.
Here is a useful read link:
The great pyramid, a radio beacon to the stars!
Can a Starfish understand the language of an Earthworm ?
Can the Earthworm defend against a Blue-Jay ?
Although we know of the Magnetic Spectrum , only a tiny fraction of it is familiar or detected by the " Humans".
Homo-Sapiens-Sapiens were "Made" to serve Visitors from the etheric 250.000 solar years ago.A stone , granite or limestone or other , when subjected to electromagnetic radiation will align it's molecules linearly to negate earths "Gravity" ( a noun we use but don't understand)and levitate to position desired and then rendered neutral to weigh in place-spot-location.Stone was "Cut" with a ( Matter Disintegrating Beam ) removing material that connects it to the surrounding material, on the sub atomic level. You might name it a sub-atomic-dis-integrator. Converts Matter to Antimatter and "Vacuums" it out to another dimension,(string theory.) Example : Nazca Plains top of flat mountain air field.Astroalcher.
Aldrons Last Hope,
In radio transmission, it is the pure and perfection you make the radio signal which is opposite to the natural electromagnet radio signal noise in the back ground that makes you easily and clearly signal to be heard.
How precise again are the pyramids you say?
You wrote: “...The 4 points match the 4 cardinal points within 1 minute of arc. The base of the pyramid is 13 acres yet the most it deviates from one corner to the next is ¾ inch (over thousands of years)this is more precise than anything we can do today...”
If a person wanted to create a natural radio signal to broadcast across the vastness of space, that radio single must contrast to the natural radio signal noise enviroment. It is an absolute must to be precise! Being precise is one method to force it to be notice as well as the power of the signal.
Aldron, not wanting to start a fight, but at the beginning of your last post you agreed with Egyptologists, but in your final sentence you said that they were spreading lies and were wrong.?