No alien civilizations? After analyzing two decades of data SETI@Home produces 100 signals “worth a second look”
For more than two decades, from 1999 to 2020, the Search for Extraterrestrial Intelligence (SETI) project asked millions of people worldwide to loan it the use of their computers so the project to could analyze twelve billion signal detections that were of interest.
After 10 years of work, the SETI@home team has now finished analyzing those detections, winnowing them down to about a million “candidate” signals and then to 100 that are worth a second look. They have been pointing China’s Five-hundred-meter Aperture Spherical Telescope, a radio telescope referred to as FAST, at these targets since July, hoping to see the signals again.
Though the FAST data are not yet analyzed, [computer scientist and project co-founder David Anderson] admits he doesn’t expect to find a signal from ET.
At the link the SETI team outlined the many reasons, all quite reasonable, for the failure to detect any obvious signals from alien civilizations. The universe is vast, they only looked at a very tiny slice, the variations of signals are many, and the amount of data was still so gigantic analyzing it was endlessly time-consuming. Moreover, they might have been looking at the wrong wavelengths, and there is even the possibility that advanced civilizations simply don’t broadcast at any wavelengths.
Nonetheless, the project was not a failure. It showed it was possible to use a lot of home computers to create the equivalent of a super-computer. The technology and volunteer system it developed has since been used by other scientists on projects like looking for clouds on Mars and studying galaxy types.
The big question remains unanswered however. Considering the numbers of stars in the galaxy, and the recent data that shows most have planets, it seems strange that there have been so few candidate detections, and even these are questionable. Could it actually be the case that we are the first sentient intelligence species in the Milky Way?
There always has to be a first. That humanity might be that first is a mind-blowing thought.
For more than two decades, from 1999 to 2020, the Search for Extraterrestrial Intelligence (SETI) project asked millions of people worldwide to loan it the use of their computers so the project to could analyze twelve billion signal detections that were of interest.
After 10 years of work, the SETI@home team has now finished analyzing those detections, winnowing them down to about a million “candidate” signals and then to 100 that are worth a second look. They have been pointing China’s Five-hundred-meter Aperture Spherical Telescope, a radio telescope referred to as FAST, at these targets since July, hoping to see the signals again.
Though the FAST data are not yet analyzed, [computer scientist and project co-founder David Anderson] admits he doesn’t expect to find a signal from ET.
At the link the SETI team outlined the many reasons, all quite reasonable, for the failure to detect any obvious signals from alien civilizations. The universe is vast, they only looked at a very tiny slice, the variations of signals are many, and the amount of data was still so gigantic analyzing it was endlessly time-consuming. Moreover, they might have been looking at the wrong wavelengths, and there is even the possibility that advanced civilizations simply don’t broadcast at any wavelengths.
Nonetheless, the project was not a failure. It showed it was possible to use a lot of home computers to create the equivalent of a super-computer. The technology and volunteer system it developed has since been used by other scientists on projects like looking for clouds on Mars and studying galaxy types.
The big question remains unanswered however. Considering the numbers of stars in the galaxy, and the recent data that shows most have planets, it seems strange that there have been so few candidate detections, and even these are questionable. Could it actually be the case that we are the first sentient intelligence species in the Milky Way?
There always has to be a first. That humanity might be that first is a mind-blowing thought.
