Why haven't we found extraterrestrial life?
Many scientists and researchers, including the most skeptics believe that the presence of life beyond planet Earth is obvious, and that definitive proof you can reach within a generation. One of the arguments is the fact that many of today's astronomical truths be unknown only a generation.The success of the Kepler telescope, NASA, led us to know that the universe is full of seasoned worlds. Only in the last two decades, thousands of planets were discovered around other stars, and new ones are appearing at a rate of one per day.More impressive, explains the IFL Science, is the fact that there are planets as far as the eye can see. Most stars have planets, which implies the existence of trillions of these small bodies in the milky way.Kepler also suggests that one in five stars can support a species of planet the size of Earth and with similar temperatures. These are also considered habitable â€" i.e. the milky way may be home to dozens of billions of our "cousins".With so many facts to take us to the same path, why we haven't found extraterrestrial life?Firstly, all our efforts for recognition of Mars, for example, seek to find places where we can find life â€" and not finding life itself. Mars is the favorite hypothesis to find life, but there are experts who would prefer the moons of Saturn and Jupiter. Here, however, the funding is low, so progress is not too large.A second chance to look for evidence of life is to realize what the atmosphere of planets around other stars. This is done through a technique of astronomy called spectroscopy â€" an approach that would allow researchers to understand the composition of an atmosphere to several light years away. And although an experiment to find oxygen or methane elsewhere is hard to describe, it is possible â€" scientists could build this strategy a dozen years but once again, there is no money to do it.A third approach would be to look beyond the microbes by intelligent life, spying through siansi radio and laser lights. More antennas and receivers could accelerate this search, but, once again, funding is a limiting factor.For 2015, the budget proposal for the American agency NASA is €1,8 billion (R $ of 5.6 billion) to planetary science, Astrophysics and continuation of work on the James Webb telescope. The budget for the SETI (search for extraterrestrial life), which assumes this third approach to finding life on another planet, is even smaller.IE: we don't know exactly if there's life in space, even though all roads follow this direction. But investments to arrive at this certainty are laughable-and so it becomes complicated to solve this puzzle. Why not discover extraterrestrial life? For financial reasons, in the latter case, and policies, in the first instance.Foto: Kevin Dooley / Creative Commons
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