Suurvalta pimittää ihmiskunnalle ulkoavaruuden siviilisaatiolta tarkoitetun viestin.
In a just issued report, Signs of Life, a multidisciplinary group of scientists grappled with techniques and technologies to detect evidence for extraterrestrial life - either on the spot on other worlds, or within prime pickings hauled back to Earth by robotic spacecraft.
Spurred largely by an April 2000 workshop held in Washington, D.C., report findings and conclusions were pulled together by the National Research Council (NRC) Committee on the Origins and Evolution of Life.
"The report is based on a workshop that brought together a healthy spectrum of senior experts and young researchers," says Jonathan Lunine, co-chair of the committee and professor of planetary science and physics at the University of Arizona in Tucson. Many of the workshop attendees are developing techniques to detect life, and modeling the environments in which such techniques might be used on other planets, he explains.
John Baross, associate professor of oceanography at the University of Washington in Seattle, also co-chairs the committee.
"The discussion was vigorous and exciting. This is a different world of life detection than that in 1976, at the time of Viking," Lunine told SPACE.com.
Lunine feels the key to success in life detection in the field is to try a range of techniques that vary in their specificity and need for prior assumptions about the nature of life. Doing so will maximize the chances for success in searches at the planet itself.
"With returned samples, of course, one should throw everything possible at the effort," Lunine explains.
The Committee on the Origins and Evolution of Life, Lunine adds, is continuing its efforts with a study on the potential nature of life that might be very different from terrestrialand how one would go about detecting such life.
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While this makes SHGb02 14a interesting, the chances that it actually represents an intelligent signal from beyond remain extremely slim. Random chance alone would make it probable that at least one of the billions of candidates detected by SETI@home would be observed on three separate occasions, as was the case for this candidate. Furthermore, as we reported in the SETI@home Update of May 17, 2004, the fact that this candidate’s frequency drifts rapidly makes it extremely improbable that it is a transmission from extraterrestrials. Because of the drift, explained Werthimer, “if we had looked at the sky even a few seconds later we wouldn’t have found a match” for this candidate. A signal that drifts so quickly that it can only be heard for seconds at a time at a given frequency can only be detected by blind luck. Needless to say, such a transmission is an unlikely vehicle for message from an advanced civilization.
In addition, SETI@home Project Director David Anderson of U.C. Berkeley pointed out that SHGb02 14a is a candidate of a type known as a "barycentrically corrected gaussian." A true transmission of this type, he explained, would remain in a more or less fixed narrow-band frequency, and not drift rapidly as this signal does.
At Arecibo the giant radio telescope still scans the sky, looking for an alien transmission. Around the world, millions are still crunching SETI@home data on their personal computers. The Search for extraterrestrial intelligence continues at full speed, but as of now there is no breakthrough.
In a just issued report, Signs of Life, a multidisciplinary group of scientists grappled with techniques and technologies to detect evidence for extraterrestrial life - either on the spot on other worlds, or within prime pickings hauled back to Earth by robotic spacecraft.
Spurred largely by an April 2000 workshop held in Washington, D.C., report findings and conclusions were pulled together by the National Research Council (NRC) Committee on the Origins and Evolution of Life.
"The report is based on a workshop that brought together a healthy spectrum of senior experts and young researchers," says Jonathan Lunine, co-chair of the committee and professor of planetary science and physics at the University of Arizona in Tucson. Many of the workshop attendees are developing techniques to detect life, and modeling the environments in which such techniques might be used on other planets, he explains.
John Baross, associate professor of oceanography at the University of Washington in Seattle, also co-chairs the committee.
"The discussion was vigorous and exciting. This is a different world of life detection than that in 1976, at the time of Viking," Lunine told SPACE.com.
Lunine feels the key to success in life detection in the field is to try a range of techniques that vary in their specificity and need for prior assumptions about the nature of life. Doing so will maximize the chances for success in searches at the planet itself.
"With returned samples, of course, one should throw everything possible at the effort," Lunine explains.
The Committee on the Origins and Evolution of Life, Lunine adds, is continuing its efforts with a study on the potential nature of life that might be very different from terrestrialand how one would go about detecting such life.
http://maverixcharm.files.wordpress.com/2008/06/1948_top_secret_usaf_ufo_extraterrestrial_document.gif
http://img508.imageshack.us/img508/6720/wowzq9.gif
While this makes SHGb02 14a interesting, the chances that it actually represents an intelligent signal from beyond remain extremely slim. Random chance alone would make it probable that at least one of the billions of candidates detected by SETI@home would be observed on three separate occasions, as was the case for this candidate. Furthermore, as we reported in the SETI@home Update of May 17, 2004, the fact that this candidate’s frequency drifts rapidly makes it extremely improbable that it is a transmission from extraterrestrials. Because of the drift, explained Werthimer, “if we had looked at the sky even a few seconds later we wouldn’t have found a match” for this candidate. A signal that drifts so quickly that it can only be heard for seconds at a time at a given frequency can only be detected by blind luck. Needless to say, such a transmission is an unlikely vehicle for message from an advanced civilization.
In addition, SETI@home Project Director David Anderson of U.C. Berkeley pointed out that SHGb02 14a is a candidate of a type known as a "barycentrically corrected gaussian." A true transmission of this type, he explained, would remain in a more or less fixed narrow-band frequency, and not drift rapidly as this signal does.
At Arecibo the giant radio telescope still scans the sky, looking for an alien transmission. Around the world, millions are still crunching SETI@home data on their personal computers. The Search for extraterrestrial intelligence continues at full speed, but as of now there is no breakthrough.
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