Monday, May 17, 1999 Published at 06:36 GMT 07:36 UK
Screening for alien life
The massive Arecibo telescope is collecting the data
By BBC News Online Science Editor Dr David Whitehouse
Anyone with a computer and an Internet connection can join a worldwide search for intelligent life in space from Monday.
When your computer is idle the program searches the data for any indication of intelligence.
Scientists believe that the best way to find life in space is to look for radio signals. Since 1960 there have been about 70 unsuccessful searches.
As the computer works on the data, the screen displays a three-dimensional graph charting the signal analysis.
Participants also can view maps showing where the Seti@home project is searching and who is taking part in the project.
After the computer is finished, it sends the results back to Seti@home scientists at the University of California at Berkeley and grabs another chunk of data.
"This project lets us do Seti a lot, lot faster, with 10 times more sensitivity and exploring more thoroughly the spectrum of radio frequencies we scan," said Seti@home's Dan Werthimer.
Louis Friedman of the Planetary Society, which is a principal sponsor for the project, said: "Never before has there been an opportunity for anyone, anywhere in the world, to join the scientific search for intelligent beings elsewhere in our universe."
He added: "This is a grand experiment - in science, in technology and in society - a global co-operative effort at the frontiers of knowledge.
"Seti@home is a way of harnessing all the idle computers to increase our computing capacity and our chance of finding extraterrestrials."
The radio data is broken down into small chunks - a 10 kilohertz range of wavelengths in a strip of sky visible from the Arecibo telescope in Puerto Rico - through which the screensaver program can search for patterns.
The data downloaded to each desktop computer takes up only about 250k of computer memory, though the computer must have 32mb of RAM to run the software.
Seti@home officials say you can download enough data through the Internet in five minutes to keep your computer analysing for several days.