GL-SETI (gravitational lensing SETI): Receiving far ETI signals focused by the gravity of other stars
The SETI League (website: http://www.setileague.org) is a worldwide organization of thousands of SETI supporters who generally use small TV dishes and PCs to do SETI searches from their own backyards. In general, such modest apparatuses could hardly be expected to lead to a contact with ETI, except for ETIs living on planets of nearby stars, but the notion of gravitational lensing changes this picture completely. In fact, it could well happen that a very precise alignment occurred casually between the ETI source, an intermediate star acting as a focusing device, and the Earth. Thus, a transient but sufficiently strong ETI signal could be detected on Earth even if it comes from a very far source in the Galaxy and even if it is detected with a small dish apparatus. It all depends on the mass of the intervening star, on the precision of the alignment, and of course on the power of the ETI emitted radio waves.
KeywordsRadio Wave Aerospace Technology SETI Supporter SETI Search Nearby Star
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