Searching For Extraterrestrial Life

We can not know how the world would be today if the miracle known as the “internet” would not have existed, if the man had not been endowed with the curiosity, which always brought only good things.

People opened their eyes to their world first, and now trying to peek in the neighbor courtyard, driven by the same restless curiosity. What is beyond us? Beyond our solar system? Beyond our galaxy?

It’s no secret that there are people who strongly believe in the existence of extraterrestrial life forms, as it is no longer a secret that astronomers are looking for any form of life on other planets at hundreds of light years from us. So far, several research missions have been initiated, but the least expensive are those that occur on Earth. Therefore, scientists currently investing in the creation of space telescopes powerful enough, that they can provide answers to some basic questions about the possibility of life on another planet: There is atmosphere? The planet has water resources? Surface temperature is acceptable? If so, these conditions existed long enough to allow formation of the first forms of life?

Spies

Armed with a space telescope and a mathematical method, astronomers turn every day into an extraordinary journey through the galaxies of the universe. “We are looking for planets similar to Earth, which is not too close, but not too far from their star.” says Darren M. Williams, professor of physics and astronomy. For life to exist, the planet must have an acceptable surface temperature for a long time, so that life forms have time to develop. Also, the water is one of the first sign that give hope to researchers.

Astronomers were able to determine the distance between a planet and its star, and with the analysis of light interacting with molecules from air, they can find out if there is water on that heavenly body. In an attempt to determine if there is water on the surface, the teachers at the University of Hawaii is based on its reflective properties. A planet like Venus, with a dense atmosphere, will scatter light in all directions. When the body is in front of the sun, the whole disk illuminated, water appears very dark. When a planet is rising with the sun slipping on the water surface, reflected light will be more powerful. To distinguish a single point, they need advanced space telescopes and a two-week observation period. Currently, space telescopes capable of identifying planets that contain liquid water do not exist.

Optimists

“If we push the boundaries of exploration far enough, we will definitely find something there. I’m sure it will be a life form, but we can not appreciate it if we find intelligent life forms, “said Mike Foreman, an astronaut from the shuttle Endeavour. “Personally, I think if we expand our research, we can discover extraterrestrial civilizations. It would be impossible for this to not happen in the near future.

Skeptics

Recent studies have shown that the humans chances to discover another intelligent life form in the universe is 0.01% over the next 4 billion years. The fact that over this time, the life on Earth will cease to exsist, is prompting scientists to be reluctant about a so-called “Third degree meetings”. Even if it is possible that similar conditions that exist on Earth to exist on other planets, the chances for life to appear there is quite small, say the skeptics.

Given the time elapsed since the appearance of life on Earth, some 4 billion years, and the emergence of Homo sapiens about 100,000 years and time until the sun will destroy all traces of life, there is a high probability that humans to be the only intelligent beings in the universe, “said Andrew Watson, coordinator of a team of British researchers.
 

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