It remains only the barest of probabilities that astronomers have just found evidence of extraterrestrial, intelligent life. Nevertheless, in the community of astronomers and other scientists who use radio telescopes to search the heavens for beacons of life there is considerable excitement about a new signal observed by a facility in Russia.
According to Paul Gilster, author of the Centauri Dreams website, the Italian astronomer Claudio Maccone and other astronomers affiliated with the search for extraterrestrial intelligence have detected "a strong signal in the direction of HD164595." HD 164595 is a star of 0.99 solar masses about 95 light years from Earth, with an estimated age of 6.3 billion years. The system is known to have at least one planet, HD 164595 b, which is similar in size to Neptune and orbits its star in 40 days. Other planets may exist in the system as well.
The observation was made with the RATAN-600 radio telescope in Zelenchukskaya, in southern Russia, Gilster reports. He cautioned that the evidence is very preliminary:
No one is claiming that this is the work of an extraterrestrial civilization, but it is certainly worth further study. Working out the strength of the signal, the researchers say that if it came from an isotropic beacon, it would be of a power possible only for a Kardashev Type II civilization. If it were a narrow beam signal focused on our Solar System, it would be of a power available to a Kardashev Type I civilization. The possibility of noise of one form or another cannot be ruled out, and researchers in Paris led by Jean Schneider are considering the possible microlensing of a background source by HD164595. But the signal is provocative enough that the RATAN-600 researchers are calling for permanent monitoring of this target.
More information may be forthcoming soon. According to Gilster, the discovery and work to understand its origin will be discussed at a SETI committee meeting during the 67th International Astronautical Congress in Guadalajara, Mexico, on Tuesday, September 27.