What can we hear in space? Space Sounds: The Music of the Cosmos #GreshamLecture It is one of the greatest achievements of modern physics that we are able to pick up the cosmic harmony of the baby universe. These sounds were not meant to be heard by human ears: the base note has a wavelength of 450 million light years. Nevertheless, this triumph of science (and music) rivals in beauty anything written by Bach. This lecture will investigate the many, surprising ways in which sound waves of variou