An ongoing search for intelligent life forms by the SETI institute studied over eighty planets that belong to the Kepler area for radio signals that could doubtlessly pin point the presence of intelligent extraterrestrial life forms.
As yet, no radio signals have been discovered however the search did determine essentially the most promising Kepler objects for large-band observations utilizing the Green Bank Telescope in West Virginia. Abhimat Gautam, of the University of California, Berkeley stated that these stars were chosen due to the number of planets they host and that were discovered in 2011 displaying properties that would suggest to the development of life.
The search for planets was relatively productive revealing over a thousand of candidates that had surface temperatures between minus 50 and a hundred degrees Celsius having a radius smaller than 3 times that of Earth, and an orbital interval of greater than 50 days, Such situations positioned the objects throughout the habitable zone round their stars, an area where liquid water could possibly exist in the surface, providing the necessary foundations for life to develop as we know it. Of course there is a very large possibility that life could also develop with totally different characteristics. Researchers are hunting for planets that have similar characteristics to Earth; suggesting that as life formed on our planet it could have also evolved on different alien planets.
The Green Bank Telescope is one of the world’s largest steerable radio telescopes that targets specific stars utilizing its large-band signal. Scientists had carried out earlier searches of the Kepler field within the narrow band with no success. By switching to wide-band, Gautam hoped for a variety of benefits where different results have been made available; which is half a billion instances wider than earlier searches. Increasing the area of the radio spectrum where researchers can seek for broader indicators than these previously noticed.
The interstellar medium — the gas and dust between stars — can spread the signal out extensively: because it travels via the material, inflicting a delay that would present scientists with a rough estimate of the space to any detectable source and permitting SETI astronomers to trace potential communications back to their origins. “Intelligent alien civilization might even use a pulsar for signaling which could be successfully detected in a “wide-band” search. The SETI search centers its research on both active and passive indicator of intelligent extraterrestrial civilizations.
With the Green Bank Telescope pointed at every target star, the radio beam would span roughly 4.2 light-years, sufficient to engulf the planetary system, together with unknown bodies.
According to Siemion’s SETI weblog, the search additionally covered an area of the radio spectrum referred to as the “terrestrial microwave window,” which might travel via both interstellar space and Earth’s atmosphere with little distortion. Within that window, the SETI search lined the “water hole,” an area of the radio spectrum bounded by the 2 products of water — hydrogen and hydroxyl.