This book explores why astronomy captivated Cornell, and considers hundreds of his works--found-footage films, three-dimensional space-object boxes, enigmatic collages, and cosmic ephemera--that contain references to astronomical phenomena. Kirsten Hoving considers Cornell's enormous collection of astronomy materials, ranging from eighteenth-century books to recent works; newspaper and magazine articles that Cornell clipped and sorted; and diary entries of his observations while stargazing in his backyard. She examines how Cornell explored many dimensions of astronomy through his identities as a Christian Scientist and surrealist artist.