Are we alone in the universe or are there other civilizations? Where to look for them? How do I contact them? What will bring humanity communication with extraterrestrial intelligence? The authors of the book, American astrophysicists, are trying to provide answers to these questions, relying on modern scientific achievements, including the results of direct research of the planets of the solar system using interplanetary spacecraft. Designed for a wide range of readers interested in the problems of life in the Universe.