The possibility of an extraterrestrial life in the outer space

Masters of disguise, they camouflage the skin on their flailing, eight-arm bodies and dive hundreds of feet below the surface of the sea. The intelligent creatures have even been known to predict the odd sports result. Now, a group of 33 scientists from respected institutions around the world have suggested these bizarre creatures descend from organic alien material.

The possibility of an extraterrestrial life in the outer space

The Physics of Extraterrestrial Civilizations How advanced could they possibly be? We have had radio telescopes and spaceships for a few decades; our technical civilization is a few hundred years old… an advanced civilization millions of years old is as much beyond us as we are beyond a bush baby or a macaque.

In particular, now that the laws of quantum field theory, general relativity, thermodynamics, etc. This question is no longer a matter of idle speculation. Soon, humanity may face an existential shock as the current list of a dozen Jupiter-sized extra-solar planets swells to hundreds of earth-sized planets, almost identical twins of our celestial homeland.

This may usher in a new era in our relationship with the universe: Today, every few weeks brings news of a new Jupiter-sized extra-solar planet being discovered, the latest being about 15 light years away orbiting around the star Gliese The most spectacular of these findings was photographed by the Hubble Space Telescope, which captured breathtaking photos of a planet light years away being sling-shot into space by a double-star system.

The possibility of an extraterrestrial life in the outer space

But the best is yet to come. Early in the next decade, scientists will launch a new kind of telescope, the interferome try space telescope, which uses the interference of light beams to enhance the resolving power of telescopes. For example, the Space Interferometry Mission SIMto be launched early in the next decade, consists of multiple telescopes placed along a 30 foot structure.

With an unprecedented resolution approaching the physical limits of optics, the SIM is so sensitive that it almost defies belief: The SIM, in turn, will pave the way for the Terrestrial Planet Finder, to be launched late in the next decade, which should identify even more earth-like planets.

It will scan the brightest 1, stars within 50 light years of the earth and will focus on the 50 to brightest planetary systems. All this, in turn, will stimulate an active effort to determine if any of them harbor life, perhaps some with civilizations more advanced than ours.

Although it is impossible to predict the precise features of such advanced civilizations, their broad outlines can be analyzed using the laws of physics. No matter how many millions of years separate us from them, they still must obey the iron laws of physics, which are now advanced enough to explain everything from sub-atomic particles to the large-scale structure of the universe, through a staggering 43 orders of magnitude.

Even an advanced civilization is bound by the laws of thermodynamics, especially the Second Law, and can hence be ranked by the energy at their disposal. This is a well-defined by product of stellar and galactic evolution, thermonuclear fusion, etc.

Thus, their energy will also be based on three distinct types, and this places upper limits on their rate of energy consumption. Any advanced civilization must grow in energy consumption faster than the frequency of life-threatening catastrophes e.

If they grow any slower, they are doomed to extinction. This places mathematical lower limits on the rate of growth of these civilizations.

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In a seminal paper published in in the Journal of Soviet Astronomy, Russian astrophysicist Nicolai Kardashev theorized that advanced civilizations must therefore be grouped according to three types: He calculated that the energy consumption of these three types of civilization would be separated by a factor of many billions.

Shorter than most realize. Berkeley astronomer Don Goldsmith reminds us that the earth receives about one billionth of the suns energy, and that humans utilize about one millionth of that. So we consume about one million billionth of the suns total energy.

The possibility of an extraterrestrial life in the outer space

At present, our entire planetary energy production is about 10 billion billion ergs per second. But our energy growth is rising exponentially, and hence we can calculate how long it will take to rise to Type II or III status.— The first detection of intelligent extraterrestrial life will likely come within the next quarter-century, a prominent alien hunter predicts.

By or so, astronomers will have scanned enough star systems to give themselves a great shot of discovering alien-produced electromagnetic signals, said Seth Shostak of the SETI (Search for .

Extraterrestrial life, also called alien life (or, if it is a sentient or relatively complex individual, an "extraterrestrial" or "alien"), is life that occurs outside of Earth and that probably did not originate from hypothetical life forms may range from simple prokaryotes to beings with civilizations far more advanced than humanity.

Universal criteria

The Drake equation speculates about the. The possibility of intelligent extraterrestrial life is an interesting question, but I think spending a lot of time pursuing various claims about sightings and getting drawn into the sensationalism of the search for such life is unprofitable (except for the producers of the programs selling their ideas).

Seth Shostak is the head astronomer at California's SETI Institute. SETI stands for Search for Extraterrestrial Intelligence, and Seth is a pretty brainy guy. Strange messages coming from the stars are ‘probably’ from aliens, scientists say 'It is too early to unequivocally attribute these purported signals to the activities of extraterrestrial.

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