A Key to the Heavens Author:Leo Mattersdorf Formerly titled "Insight into Astronomy," the book seeks to unfold the timeless mysteries of the heavens -- the solar system, the moon and planets, eclipes, tides, how time is determined and other facets of this subject. In the preface the author acknowledges his debt of gratitude "to Professor Albert Einstein for his kindness in reading the man... more »uscript and, then, sitting down with me and offering many helpful suggestions."« less