One method is by the use of radio waves. We have been sending radio and TV broadcasts into space for the better part of 100 years now. In that time our signals could have reached over 10,000 stars in our local part of the Milky Way Galaxy. Several careful and systematic projects here on Earth are attempting to detect such alien signals. This endeavor is known as the Search for Extra-Terrestrial Intelligence or SETI for short.
Several programs exist that anyone can help with.
The Layton P. Ott Planetarium at Weber State University is sponsored by the Department of Physics and the College of Science . All images on this page are copyright 1999 by the Buhl Planetarium. The images may be freely used without permission only if in conjunction with promotion or review of this planetarium show. This page was last modified April 1, 2001. A total of people have visited this page.