The author of this book is A.V. Arkhipov is a professional astronomer who has been studying mysterious phenomena for more than twenty years, having defended his dissertation on fundamentally new ways to search for extraterrestrial civilizations. Textbooks and popular literature pass over many unusual astronomical observations and facts in silence. The forgotten romance of scientific research and an abundance of amazing information from serious scientific literature are combined in the book with the author's analysis and publicly accessible presentation. The reader will take a fascinating journey into the realm of unknown astronomy, learn about the discoveries of strange objects on Earth and mysterious phenomena in the sky, about the unsolved mysteries of the Moon and planets, about extraterrestrial archeology and the mysteries of hoary antiquity. Most of the book talks about new possibilities for searching for intelligent life in the Universe.