This book describes our gradual awareness of a vast, previously concealed Universe. It is a story of expanding horizons and the discovery of invisible worlds. This voyage of discovery is presented within universal themes, such as invisibility, motion, content, form, impermanence, violence and emptiness, beginnings and ends. These are topics that concern us all, helping us take the Universe personally, so each chapter begins with the human aspect of some of these themes. The book is additionally broadened by including the perceptions of artists, poets and writers, as well as with line drawings that forcefully compact a scientific insight.

Professor Lang has written several books about the Sun, as well as widely used reference works in astronomy and astrophysics. He has carried out radio observations of the active Sun with the Very Large Array in support of the SOHO spacecraft, teaches an extremely popular introductory course about the Sun to Tufts University students with non-scientific majors, and has served for two years as Visiting Senior Scientist in Solar Physics at NASA Headquarters.