Note:

• First German Edition
• First printing stated: "1. Auflage 1968"
• Translator: Fritz Frank

Contents in English: Preface 1 (Voices from the Sky) 8 • Space Flight and the Spirit of Man 20 • The Uses of the Moon 39 • To the Stars 53 • Beyond Centaurus 71 • The Light of Common Day 85 • Ships for the Stars 103 • Seas of Tomorrow 110 • The Winds of Space 123 • Time for the Stars 138 • The Playing Fields of Space 151 • Preface 2 (Voices from the Sky) 153 • A Short Pre-History of Comsats, Or: How I Lost a Billion Dollars in My Spare Time 164 • The Social Consequences of the Communications Satellites 178 • Broadway and the Satellites 184 • The World of the Communications Satellite 199 • Preface 3 (Voices from the Sky) 200 • Kalinga Award Speech 207 • Memoirs of an Armchair Astronaut (Retired) 224 • Science and Spirituality 228 • Class of '00 235 • The Meddlers 243 • The Lunatic Fringe 251 • The Electronic Revolution 259 • H. G. Wells and Science Fiction 269 • "Dear Sir ..." 283 • Extraterrestrial Relays