“The Moon is a ball of left-over debris from a cosmic collision that took place more than four billion years ago. A Mars-sized asteroid - one of the countless planetesimals that were frantically churning our solar system into existence - hit the infant Earth, bequeathing it a very large natural satellite.”

A SETI astronomer and senior astronomer at the SETI Institute, Shostak explores the search for extraterrestrial intelligence with both scientific rigor and accessible clarity. His work bridges the gap between cutting-edge research and public understanding, offering perspectives on the cosmos, human curiosity, and the future of life beyond Earth.