Search for Extra-Terrestrial Intelligence
The Search for Extra-Terrestrial Intelligence (SETI) is various efforts to find signals from extraterrestrial life. It included a program that individuals could use on their computers to search for radio signals from worlds with alien life. This was maybe the most famous of the BOINC or Berkeley Open Infrastructure for Network Computing programs that allow users to use their computers for scientific research.
Search For Extra-Terrestrial Intelligence Media
Arecibo Telescope in Puerto Rico with its 300 m (980 ft) dish was one of the world's largest filled-aperture (i.e. full dish) radio telescopes and conducted some SETI searches.
Microwave window as seen by a ground based system. From NASA report SP-419: SETI – the Search for Extraterrestrial Intelligence
Example of a high-resolution pictorial message to potential ETI. These messages usually contain information about the location of the solar system in the Milky Way.
