This is, among other things, because of the pollution in the radio fields
For almost 40 years, organized searches have been conducted for intelligent beings outside
to the earth So far without success. in science fiction literature and cinema,
We have long been acquainted with initial contact with an extraterrestrial culture. in most
In the cases, it was presented as a response to previous contact and exchange of transmissions in the field
the radio.
And this is also the direction in which this field has developed until today.
But there are researchers who now believe that it is better to change the spectral domain of
The searches and carry them out in the field of visible light radiation. The idea was raised further
in 1960 and is recycled these days following significant developments that have taken place
Strengthening high intensity light radiation and due to "pollution" of the radio field to the facilities
operating on Earth.
First they looked for extraterrestrials in observations of sun-like stars in the vicinity
The closest to us - a few tens of light-years from the sun. The searches focused on the field
The radiation that corresponds to the emission of the natural energy of hydrogen atoms - the substance
The common neutral in the universe. This area of radiation is considered a "valley."
Opportunities" in the jungle of electromagnetic radiation. The searches did not go well
To this day, there is no unequivocal proven evidence of the existence of an extraterrestrial culture
Country.
The new proposal regarding a search to be made in the field of visible light was brought up by Avot
The laser device, shortly after it was invented. According to calculations from 1960 Laser
A omnipotent being (which does not exist) would appear to an observer from Earth as a pale star
most - but it can be detected in the large telescope (of those days),
The diameter of its receiving mirror is 5 meters (Mount Plummer telescope in the USA).
Since then, there have been dramatic changes: the volume of broadcasts in the field of radio has changed
The human being produces thousands of counters, thanks to the radio and television stations,
Military broadcasts, wireless and cellular phones. The number of broadcasts
And their wide spread in the electromagnetic spectrum makes searches difficult. but
The intensities that are achieved today thanks to high-power lasers, cost thousands
There are also those who were considered a dream in the 60s
The significant developments of laser devices, especially the military ones (for destruction
Missiles and spaceships) for example) and also lasers for nuclear fusion, completely change
the thinking about the ability of extraterrestrials to use this communication channel,
to interstellar ranges. Today we expect to achieve laser pulses of five
The second billionth and whose power is 500 million million watts, in the "facility
The national ignition" of the USA. It is designed to ignite nuclear fusion of hydrogen
Heavy for helium nuclei.
If extraterrestrials used such a device to signal to Earth -
We were able to detect these signals.
Attempts to detect optical signals from nearby stars were made further
In the 70s by Russian scientists, at the observatory in the Caucasus. verb
A huge telescope with a diameter of six meters. A special device, built to explore sources
Light that changes its brightness at an extremely fast rate, was activated in this search - also
He is unsuccessful.
And now groups of astronomers are organizing in the USA and Australia
To start a new operation of searching for the fastest change of light
The nearest stars.
It is possible that in Israel too it will be possible to carry out a similar study - if converted to this purpose
The giant solar collector at Ben-Gurion University in Sde Boker, used by
Desert Research Institute. With its help, the falling radiation will be concentrated on a plate in diameter
25 meters to a relatively small spot - then it will be possible to detect signals that may be
Other beings from outer space are transmitting to us.
