People were asked to search for extraterrestrial intelligence on polluting planets




Humanity stands at the threshold of detection of alien life . Studying the atmospheres of planets outside our solar system, scientists are looking for oxygen and methane, which may indicate the existence of life. But these gases come from microorganisms – a simple form of life. What about advanced civilizations? Can they leave trails on which you can find them?

Advanced civilizations may pollute the atmosphere with industrial wastes. According to PhysOrg, a new study by the staff of the Harvard-Smithsonian Center for Astrophysics (CFA), has shown that under ideal conditions, there is a chance to discover the traces of dirt. This would suggest a new approach to the search for extraterrestrial intelligence (SETI).

We believe that industrial pollution indicate intelligent life forms, but maybe there are more advanced civilization, as compared to ours, and they have their own program of SETI, which are not considered pollutants as arguments in favor of the existence of intelligent life, as unwise pollute the air you breathe himself – said Henry Lin, a Harvard student and lead author of the study.

Lin said that people imagine aliens as little green men, but found this way, “fellow human beings” can not be called “green” because of their hostile attitude towards the environment.

The research team believes that the space telescope, the James Webb (James Webb Space Telescope, JWST), whose launch is scheduled for 2018, will be able to detect two types of chlorofluorocarbons – the ozone-depleting chemicals in the composition of solvents and aerosols. According to scientists, JWST will be able to keep track of chlorofluorocarbons, even if the weather conditions on the planet many times will differ from the earth. In addition, an advanced civilization might deliberately contaminate the gaseous envelope of the planet.

But there is one caveat. JWST telescope can find contaminants only Earth-like planets orbiting stars of low luminosity, the so-called white dwarf. Under these conditions, the chances to fix atmospheric signal will increase significantly. For the study of extrasolar planets with a star solnechnopodobnoy require more advanced telescope, the researchers note.

According to scientists, the white dwarf may be the best place to look for extraterrestrial life than previously thought. For example, recent observations of such places helped discover a number of new planets.

During a search of chlorofluorocarbons have a chance to discover not only the existing alien civilization, but also the ruins of a previous civilization that destroyed itself by its own hands. For example, in the Earth’s atmosphere some contaminants may be present 50,000 years, others – 10 The presence of long-lived molecules and the complete absence of short-lived particles may indicate that the planet has existed a source of air pollution in the past. Previously, other researchers have proposed to organize a search for the dead aliens .

In the last example, researchers have reminded us that it is necessary to take care of our own planet.
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Tags: Extraterrestrial Life , Space telescopes , Exoplanets .

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