Standard SETI Project regards the search for extraterrestrial intelligence directly from planets of other stars using radio and optical observational techniques coupled with multichannel spectrum analyzers and powerful algorithms potentially able to decode intelligent signals. Apart from some false alarms, during the last 50 years nothing reliable has been found yet. The SETI Project doesn’t consider the possibility that other civilizations might reach us directly and that astrophysical techniques can verify if this hypothesis is true or not.