10 ways in which the aliens are able to contact us
Mankind still has not met any one form of life beyond our planet. If you ignore the tales of "Area 51" and "eyewitness encounters with UFOs and their pilots," we still have not received any extraterrestrial signals, even remotely trying to be like trying any reasonable civilization to establish contact with the interstellar or intergalactic communication. In general, no Ewoks and E.T.
Given a surprising level of technology development, we have achieved over the past 100 years, we could safely assume that any other advanced civilization, mastered space travel and there were even a few hundred years before our own, at the moment would have even more advanced technologies.
Mankind invented many ways of transmitting messages through space. Some are used now, while others will come. If one superprodvinutye aliens want us to talk, it will appear in front of them a real choice.
The good old radio waves
It is what first comes to mind to people when they talk on the subject of communication with aliens. Receiving and sending messages with the help of this method became the object of interest of many science fiction books and films such as "Contact" and "Independence Day." In the end, we are working with radio waves for nearly a hundred years and have achieved quite a good level of efficiency in their use. Many serious scientists and organizations such as the SETI, are still using radio waves as the main tool to search for extraterrestrial intelligence.
Using the same radio waves in the late 70s was found the famous "WOW signal" - a sudden and abrupt release of radiation from a nearby star cluster to us, who for many years because no one really could not explain. Until recently . Although, according to the latest information, some astronomers still doubt that the real source of the signal being detected. Be that as it may, the radio detection method has several critical shortcomings. The first one is that the farther you are from the source of radio waves, so they are weaker. In this case, radio waves sent us into space for the last hundred years, actually dissipate in just a few light years, becoming quite elusive.
The solution to this problem could be the use of larger transmitting radiotarelok, but in this case we will be faced with a lot of complex engineering problems. One of them - the need to build really huge plates, up to the size of the Earth itself. Theoretically, any overdeveloped space civilization could already solve the problem due to the high level of development of its technology, but for some reason I want to believe that she was able to come to a more efficient and less resource-intensive method from the list below.
Where the fold and become useless radio waves, lasers can be a more effective way to communicate over long distances of space. Their advantage is the integrity and density. Sent a message from the laser galaxy far far away upon arrival to us will remain clear.
In addition, it plays for the benefit of the laser focus messages. In even a single target can be selected as a delivery goal posts, thereby increasing the effectiveness of such communication. In this regard, lasers are significantly outperform the radio waves. Enough advanced civilizations could send a laser transfer messages to other systems that are hundreds of light years. And one of these messages might be caught, and here on earth.
However, there is a question: what frequency to use a laser signal for transmission? If civilization will be advanced enough, it could be used for this gamma rays. A similar type of radiation can be transmitted on a really huge distances. Of course, it will require a huge amount of energy, but if we assume that the lack of a developed civilization will not be observed in most of these resources and the problems should arise.
For us, a potentially more realistic in the current environment option is to use infrared or microwave laser. If only because they require less energy. And, by the way, the message transfer method, we already begin to gradually adapt.
You may have heard about the telescope "Kepler" - space observatory space agency NASA, with which searches for exoplanets by observing the changes in stellar brightness that occurs as a result of transit passage of the planet by the star.
Now let's imagine that some advanced space civilization has found a way to put into orbit its star to artificially create a giant object rectangular or triangular in shape, and, perhaps, even some 1258-rut (object 1258 by the parties). In this case, we just need to figure out how the object will be displayed in the data the telescope, which in principle would be feasible in practice, although it is necessary to tinker.
What is even more interesting is the fact that extraterrestrial civilizations do not even need to be a super-advanced, to have such an opportunity. Even we are capable of such an adventure through a couple of hundred years. Just something and need - to make the object of a very thin, to deliver into space and assemble in orbit.
The method is very similar to the previous one, with the only exception that is to be able to just really technologically advanced civilization. And the main purpose is not explained by a simple desire to contact us. Rather, the main task here will be to collect the energy that makes the star.
The idea is this: why should put into orbit the usual pieces of iron, if you can bring back the billions of solar panels to collect the energy of the star? Sounds crazy, I know. But given our current level of technology, mankind will be able to achieve this level of technology within a few hundred, and in a less optimistic case - a thousand years.
With the ability to manually change the starlight, an advanced civilization could send us a reasonable-looking message. And it would be much easier to catch and to understand such messages, rather than sit and decipher the effects caused by an orbiting object of some complex geometric shapes, like the above paragraph.
Collect energy stars could also be used to power other communication equipment and technologies described in this article. Any civilization that will be able to create similar structures, will be automatically up the development of us. And if we somehow first be able to detect such activity, then send a response to this message will not be the best idea for us.
If we imagine that somewhere there is a civilization superior to us for a few million years in technological development, why not also imagine that such a civilization would be able to manipulate the movement of space objects in at least its galaxy? Let's say, to attract our attention, she could control the behavior of a nearby star or other objects. For instance, first accelerate objects to near light speed and then decelerate. Do it again and again. Eventually, someone will notice.
Alternatively, you can very quickly change the properties of the star, such as its brightness, and thus send encrypted messages, for example, prime numbers or the digits of the number pi. Of course, such opportunities will definitely require huge energy costs, and the technology itself, allowing a crank, we can imagine except that only in science fiction.
Nevertheless, the Earth each night astronomers continue to peer into the depths of space, hoping to find something extraordinary that would definitely attract our attention. The above described features for us, of course, would seem godlike.
Most recently, humanity has confirmed the existence of gravitational waves (rapid changes in space-time curvature). In 2015, scientists from the laser-interferometric gravitational-wave Observatory (LIGO) conducted an experiment and announced the first in the history of the real observation of ripples of space-time, which was predicted by Einstein.
An advanced civilization with the help of neutron stars and black holes (the main sources of gravitational waves) could send us strange, but it is clearly sensible signals. Little "pohimichit" with the frequency and amplitude of the waves - and with them, you can transfer the encoded information.
All this, of course, will require technological excellence in the development. But the good news is that even our current sensors capable of detecting gravitational waves, launched from distances of billions of light years. Therefore, any civilization that decides to use them as a means of communication, immediately "will appear on our radar." In fact, these distortions of space-time is so small that it is a distance smaller than the diameter of a proton. But if aliens really want to get our attention, they could increase the scale of these waves, so that we can get from them a clear message. Although the embodiment in which they could use these waves in such a way that they will be able to kill all living things, in theory, is also acceptable.
The bombardment of highly charged particles of
Earth is a colossal volume of radiation each day. But if aliens know a way to change it even more volume, then, most likely, with the help of radiation and they can send signals that we can detect. Just something and need - to send increased by only a few percent of the total amount of highly charged particles, and it is definitely our scientists noticed. And the very change in the number of particles can be used as the character encoding for messages.
Of course, you can think of and more ecological method. But who among advanced civilizations will take care of some kind of security billions of bipedal apes?
In general, our science this way of communication is still unknown. In addition, it is unknown how all through this method can transfer more or less directed messages. In fact, from our point of view, this method does not seem the most appropriate and effective for interstellar communication. But if the aliens have already mastered it, then why not?
The destruction of something big in space
If civilization will be quite technologically advanced, it is indeed possible. Destruction of large objects in ways that definitely attract our attention, and then send a message to other methods - clearly will not go away from our eyes and ears. For example, the aliens can run a huge swarm of nanorobots, disintegrating large objects and turning them into elementary particles, or use black holes as a sort of intergalactic eraser, erasing everything on their way from reality. Fun, right? A more sensible course would be to change the rate of decay of a space object like a red dwarf (star power to burn trillions of years), it quickly "put out." Our scientists have never seen the death of a red dwarf star. Probably because the universe itself there is less than equal to potentially life cycle such stars. Here we were surprised!
In fact, we do not know whether such objects are physically possible. But if it turns out that wormholes - is not only our hypotheses, but also quite a vsamdelishnye reality, we still do not know how (natural or artificial) that can be created.
But it is precisely from that moment begins the fun. Perhaps the aliens have already found a way to put a wormhole near us in the manner of "Interstellar" and use it as a kind of portal for the transmission of both physical objects and radio messages.
Maybe someday with us wormhole opens, and out of it will be a fleet of ships, willing to make the first contact. Or wishing to harvest ...
Changing the laws of physics
When we look into space, then I think that the laws of physics to the whole universe, they are constant and never changing. It seems that all that is really true, but what if we're wrong?
What if incredibly technologically advanced aliens have found a way to manipulate the physics so that it greatly simplifies the use of the methods that have been described above?
When you are subject to the laws of physics - you are able to manage everything. If so, our tiny, though, and developed a monkey brains are not yet able to understand many things happening, even in those parts of the universe, to which got our eyes, what can we say about the technologies that can not simply be ignored, but in fact change for themselves the laws of physics? Just imagine that somewhere there may be technologies that can not only destroy large objects, and just pull them over the brink of existence. And instead of simply destroy us in the fiery hyena, these technologies can deprive us of the possibility of existence as such.