Space Invaders

Manned space programs attract the most media attention, and it is not hard to understand why-the danger, the heroism, the sheer adventure we as earthbound observers can imagine when humans are involved. But robotic missions deserve a respectful and detailed history and analysis of their own, and this book provides it.

Focusing on future modern spacecraft, Michel van Pelt explains the exciting life of unmanned space explorers, making the technology, design, development, operation and results of modern space probe missions understandable by lay readers.

Instead of describing one specific spacecraft or mission, Michel van Pelt offers a "behind the scenes" look at the life of a space probe: from its first conceptual design to the analysis of the scientific data returned by the spacecraft.

While most popular books on space concentrate on manned spaceflight, this book shows that unmanned space exploration is just as exciting. It demonstrates to the reader just what it takes to send a robotic spacecraft to another planet and what fascinating insight and knowledge we have gained from these probes.

**Offers an insight into the life of a space probe from concept through design to return and analysis of scientific data.

**Explains what it takes to send a robotic space probe to another planet.

**Demonstrates that unmanned space exploration can be as exciting as manned exploration.

Provides the reader with a view of how the fascinating images and knowledge are obtained from these probes. Focuses on modern spacecraft and the future, rather than the history of past projects

Résumé
CHAPTER 1: INTRODUCTION 1 From the Ground Up 3 Rockets and Satellites 4 To the Moon 15 Humans versus Robots 18 CHAPTER 2: A SPACE ROBOT IS BORN 23 Scientific Conception 25 Proving Technology 33 The Political Push 36 Paper Spacecraft 38 It'sJust a Phase I'm Going Through 48 CHAPTER 3: ANATOMY OF A SPACE PROBE 53 Bits and Pieces 55 Power 57 Vll Contents Communication 65 Structures 70 Thermal Control 73 Attitude Control 77 Propulsion 86 Data Handling 89 Mechanisms 93 The Kidnap ofLuna 1 95 CHAPTER 4: BUILDING AND TESTING 97 The Spacecraft Garage 97 Keep it Clean 100 Planetary Protection 102 Shake, Rattle 'n' Roll 108 Shaken, not stirred 110 Canned space 112 Antenna testing 112 Special cases 113 Breaking the software 114 CHAPTER 5: INSTRUMENTS OFS CIENCE 115 The More we Learn, the More we Don't Know 116 Let's get Physical 118 It's All in the Data 121 Many Eyes 122 123 Visible light instruments There is more than meets the eye 126 Messenger's Instruments 129 Roving Around 132 Diving through an Atmosphere 140 142 Primeval soup Going down 142 CHAPTER 6: LAUNCH 149 On the Road 149 Spaceports 150 Preparing for Launch 153 Up and Away 156 Rockets 159 162 Orbits Vlll Contents CHAPTER 7: DISTANT DESTINATIONS 167 To the Moon 170 The first visits 170 Preparing for Apollo 172 Robot rovers 175 Modern missions 176 A new Moon 177 Unromantic Venus 179 Greenhouse nightmare 179 Into the unknown 180 Magellan 186

Contenu

1. From the ground up; 2. Rockets and satellites; 3. To the Moon; 4. Human versus robot; 5. A Space Robot is Born; 6. Anatomy of a Space Probe; 7. The Payload: Instruments of Science; 8. Launch; 9. Distant Destinations; 10. Calling Earth; 11. Death of a Spacecraft; 12. The Future; 13. References.