The search for life in the universe
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| Format: | Buch |
| Sprache: | English |
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Sausalito, Calif.
University Science
2001
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| Ausgabe: | 3. ed. |
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| 245 | 1 | 0 | |a The search for life in the universe |c Donald Goldsmith ; Tobias Owen |
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| adam_text | The Search for Life
in the Universe
THIRD EDITION
; Donald Goldsmith
; INTERSTELLAR MEDIA
« » -v
Tobias Owen
UNIVERSITY OF HAWAII
University Science Books
Sausalito, California
Contents
Foreword by Jill Tarter xiii
Preface xv
Part One: Why Do We Search? 1
Chapter 1 The Search from the Human Perspective 3
The Quest for Life s Origins 5
The Importance of Mars 7
The Scientific View of the Universe 11
The Laws of Nature 12
Applying Scientific Thinking in Everyday Life 13
The Scientific Method in the Search for Extraterrestrial Life 14
Cosmic Loneliness 17
A Conservative Approach to the Search for Life 19
SUMMARY 20 • KEYTERM 21 • QUESTIONS 21 • FURTHER READING 21
Part Two: The Universe 23
Chapter 2 The Universe Small and Large 25
The Distances to Astronomical Objects 27
The Scale of the Solar System 30
Measuring Stellar Distances with the Parallax Effect 31
Estimating Distances with the Inverse-Square Brightness Law 34
The Spectra of Stars 35
SUMMARY 43 • KEY TERMS 44 • QUESTIONS 44 • FURTHER READING 44
Chapter 3 The Birthplaces of Stars 47
Probing the Spaces Between the Stars 49
Radio Waves from Interstellar Hydrogen Atoms 51
Interstellar Dust Grains 55
Interstellar Molecules 55
Molecular Clouds 57
The Different Types of Molecules in Molecular Clouds 59
Did Life Begin in Interstellar Clouds? 62
The Birth of Stars 63
How Many Stars Form with Planets? 65
SUMMARY 66 • KEY TERMS 67 • QUESTIONS 67 • FURTHER READING 68
Chapter 4 Energy Liberation in Stars 69
Types of Stars 70
The Temperature-Luminosity Diagram 74
Red Giants and White Dwarfs 76
Stellar Lifetimes 77 vii
viii CONTENTS
How Stars Liberate Energy 78
The Proton-Proton Cycle 78
The Importance of Temperature Inside Stars 82
The Struggle Between Gravity and Pressure 85
The Influence of Mass on Stellar Lifetimes 85
SUMMARY 88 • KEY TERMS 88 • QUESTIONS 88 • FURTHER READING 89
Chapter 5 How Stars End Their Lives 91
Nuclear Fuel Consumption in Stars 91
The Evolution of Stars 92
The Red-Giant Phase 94
White Dwarfs 96
Could Civilizations Exist Around White Dwarfs? 98
Supernova Explosions 98
The Production of Heavy Elements in Supemovae 100
The Effects of Supemovae on Later Generations of Stars 103
Cosmic Rays 104
Black Holes 105
Pulsars: Cosmic Lighthouses? 105
Precise Pulsar Timing Reveals the Existence of Planets! Ill
The Binary Pulsar and Gravity Radiation 111
Gamma-Ray Bursters: Mysterious Powerhouses of the Cosmos 114
SUMMARY 116 • KEY TERMS 117 • QUESTIONS 117 • FURTHER READING 118
Chapter 6 Galaxies and the Expanding Universe 119
Spiral Galaxies 121
The Structure of Spiral Galaxies 123
Dark Matter in Spiral Galaxies 126
Elliptical Galaxies 128
Irregular Galaxies 130
The Formation of Galaxies 130
Star Clusters 133
Radio Galaxies 135
The Doppler Shift and the Expanding Universe 136
The Big Bang 140
The Cosmic Background of Photons 142
The Hypothesis of the Inflationary Universe 144
Dark Matter on the Largest Scales of Distance 145
Is the Universe Finite or Infinite? 147
Will the Universe Expand Forever? 149
Quasars 152
Accretion Disks and Supermassive Black Holes 154
Could Quasars Be Intergalactic Beacons? 155
SUMMARY 156 • KEY TERMS 158 • QUESTIONS 158 • FURTHER READING 159
Part Three: Life 161
Chapter 7 The Nature of Life on Earth 163
What Is Life? 163
Biologically Important Compounds 167
The Capacity to Reproduce 172
CONTENTS
DNA Does More than Govern Reproduction 173
Evolution and the Arrow of Time 178
Energy 180
The Unity of Life 182
SUMMARY 183 • KEY TERMS 184 • QUESTIONS 184 • FURTHER READING 185
Chapter 8 The Origin of Life 187
How Earth Got Its Atmosphere 189
The Evolution of the Atmosphere 191
The Effects of Life on the Evolution of Earth s Atmosphere 192
Early Ideas About the Origin of Life 196
The Chemical Evolution Model for the Origin of Life 197
An Experimental Test of the Primordial-Soup Model 200
Did Life Really Originate in This Manner? 202
An External Alternative 203
Polymerization 205
Is Our Starting Point Too Advanced? 207
Beyond Polymers 207
SUMMARY 210 • KEY TERMS 211 • QUESTIONS 211 • FURTHER READING 211
Chapter 9 From Molecules to Minds 213
Prokaiyotes 213
Eukaryotes 217
The Great Leap Forward 220
Suitable Stars for Life 223
Life on Other Planets 224
Evolution and the Development of Intelligence 226
Is Intelligence Inevitable? 226
Future Evolution on Earth 230
The Web of Life 231
SUMMARY 233 • KEY TERMS 234 • QUESTIONS 234 • FURTHER READING 235
Chapter 10 How Strange Can Life Be? 237
The Chemistry of Alien Life 237
The Superiority of Carbon 239
Solvents 242
Nonchemical Life 246
Black Clouds 248
Life on Neutron Stars 250
Gravitational Life 252
The Advantages of Being Average 253
SUMMARY 254 • KEY TERMS 255 • QUESTIONS 255 • FURTHER READING 255
Part Four: The Search for Life in the Solar System 257
Chapter 11 The Origin and Early History of the Solar System 259
The Formation of the Solar System 260
Comets 266
Asteroids, Meteoroids, and Meteorites 273
Bombardment of the Inner Planets: A Threat to Life? 275
XCONTENTS
Meteorites 278
Amino Acids in Meteorites 279
Mercury and the Moon 280
The Early History of the Earth and the Moon 282
Human Exploration of the Moon 285
SUMMARY 287 • KEY TERMS 288 • QUESTIONS 289 • FURTHER READING 289
Chapter 12 Venus 291
The Temperature and Rotation of Venus 292
The Atmosphere of Venus 294
The Greenhouse Effect 295
Why Is Venus So Different from Earth? 297
Life on Venus? 300
Exploration of Venus by Spacecraft 302
SUMMARY 305 • KEY TERMS 305 • QUESTIONS 305 • FURTHER READING 306
Chapter 13 Mars 307
Modem Observations of Mars 309
Results from Early Space Probes to Mars 310
The Viking Project 315
Mars After Viking 321
Further Missions to Mars 326
Phobos and Deimos 330
SUMMARY 332 • KEY TERMS 332 • QUESTIONS 333 • FURTHER READING 333
Chapter 14 Is There Life on Mars ? 335
How to Find Martian Microorganisms 337
The Viking Results: Atmospheric Analysis 339
The Viking Results: Soil Analysis 340
The Viking Biology Experiments 341
Results of the Viking Biology Experiments 344
Did the Vikings Land in the Wrong Places? 346
An Ancient Eden? Goals for Future Exploration 349
Rocks from Mars! A Preview of Coming Attractions 350
What Went Wrong on Mars? 353
Epilogue: What About That Face on Mars? 354
SUMMARY 357 • KEY TERMS 358 • QUESTIONS 358 • FURTHER READING 359
Chapter 15 The Giant Planets and Their Satellites 361
Spacecraft to the Outer Solar System 362
The Composition of the Giant Planets 368
Chemistry on the Giant Planets 371
Could Life Exist on the Giant Planets? 374
Rings and Satellites 375
Titan 379
Iapetus: An Intelligence Test for Earthlings? 383
Triton: Chemistry at Low Temperatures 384
Cosmic Messengers 385
SUMMARY 386 • KEY TERM 387 • QUESTIONS 387 • FURTHER READING 388
CONTENTS
Part Five: The Search for Extraterrestrial Intelligence 391
Chapter 16 Is Earth Unique? 393
Which Characteristics Distinguish Earth as an Abode of Life? 394
Avoiding Regions of Cosmic Violence 395
The Need for Heavy Elements 395
The Importance of Temperature 396
The Threat of Impacts 398
The Advantages of a Large Moon 400
A Conservative Approach: Defining the Habitable Zone Around a Star 401
Which Stars Offer Good Habitable Zones? 402
Can Multiple-Star Systems Provide Good Habitable Zones? 407
Discovering Extrasolar Planets: Six Promising Methods and
One Highly Successful One 409
SUMMARY 414 • KEY TERMS 415 • QUESTIONS 415 • FURTHER READING 416
Chapter 17 The Discovery of Extrasolar Planets 417
The Great Success: Using the Doppler Effect to Discover Extrasolar Planets 417
What Does the Doppler-Shift Method Reveal About Extrasolar Planets? 419
The Doppler-Shift Technique Reveals New Worlds 424
Why Do So Many Extrasolar Planets Orbit So Close to Their Stars? 427
The Importance of Jupiter s Distance 430
The Mystery of Eccentricity 431
How Many Stars Have Planets with the Right Conditions for Life? 432
Alternative Possibilities for Habitable Planets 433
How Many Habitable Planets Exist in the Milky Way? 434
How Can We Discover Earthlike Planets Around Other Stars? 435
SUMMARY 439 • KEY TERMS 439 • QUESTIONS 439 • FURTHER READING 440
Chapter 18 Extraterrestrial Civilizations: How Many? How Distant? 441
How Many Civilizations Exist? 442
Estimating the Number of Civilizations by Using the Drake Equation 443
How Many Stars in the Milky Way? 443
How Many of These Are Suitable Stars? 445
How Many Suitable Planets Orbit Each Suitable Star? 446
What Fraction of Suitable Planets Actually Produce Life? 446
What Fraction of Planets with Life Develop an Intelligent Civilization? 446
How Long Do Intelligent Civilizations Last? 449
The Importance of Survival 451
How Eager are Civilizations for Contact? 452
How Widely Separated Are Civilizations in the Milky Way? 455
Further Advances of Intelligent Civilizations 458
SUMMARY 462 • KEY TERMS 463 • QUESTIONS 463 • FURTHER READING 464
Chapter 19 Interstellar Spaceflight 465
Sending Information: Photons Versus Rockets 465
Interstellar Spaceships 467
Faster, Larger, More Expensive 468
xii CONTENTS
When Time Slows Down 472
The Difficulties of High-Velocity Spaceflight 475
Automated Message Probes 477
SUMMARY 480 • KEY TERMS 481 • QUESTIONS 481 • FURTHER READING 482
Chapter 20 Interstellar Radio and Television Messages 483
Where Should We Look? 485
What Frequencies Should We Search? 487
What Frequency Bandwidth and Total Frequency Range to Examine? 491
How Can We Recognize Another Civilization? 494
The Present State of Radio Searches for Other Civilizations 497
What Messages Could We Send or Expect to Receive? 500
A Crucial Difference: Beamed Signals versus Eavesdropping 505
Do SETI Searches Limit Themsleves Too Severely by Relying on Radio Waves? 506
SUMMARY 507 • KEY TERMS 508 • QUESTIONS 508 • FURTHER READING 509
Chapter 21 Extraterrestrial Visitors To Earth? 511
What Evidence Do We Seek? 511
Four Representative UFO Sightings 512
An Experiment: Meteors and Falling Rockets 513
The Lubbock Lights 516
Venus in Georgia 518
Landing in Socorro 518
Difficulties in Verifying the Spacecraft Hypothesis 520
Classification of UFO Reports 520
Arguments for the Spacecraft Hypothesis 522
Some Conclusions About UFOs 524
What About a Government Conspiracy? 524
Von Daniken: Charlatan of the Gods? 526
SUMMARY 531 • KEY TERM 531 • QUESTIONS 532 • FURTHER READING 532
Chapter 22 Where Is Everybody? 533
We May Be Alone, or Nearly So 534
Advanced Civilizations May Have Little Interest in Communication 539
We Are Still a Primitive Civilization 541
Epilogue: The Search Continues 543
FURTHER READING 544
Some Internet Web Sites Relevant to the Search for Life in the Universe 547
Appendix 548
Glossary 551
Figure Credits 565
Index 567
|
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| illustrated | Illustrated |
| indexdate | 2025-02-03T16:44:36Z |
| institution | BVB |
| isbn | 1891389165 |
| language | English |
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| publisher | University Science |
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| spellingShingle | Goldsmith, Donald 1943- Owen, Tobias The search for life in the universe Astrobiologie swd Außerirdisches Leben swd Astronomy Life on other planets Kosmogonie (DE-588)4073736-6 gnd Außerirdisches Leben (DE-588)4003864-6 gnd |
| subject_GND | (DE-588)4073736-6 (DE-588)4003864-6 |
| title | The search for life in the universe |
| title_auth | The search for life in the universe |
| title_exact_search | The search for life in the universe |
| title_full | The search for life in the universe Donald Goldsmith ; Tobias Owen |
| title_fullStr | The search for life in the universe Donald Goldsmith ; Tobias Owen |
| title_full_unstemmed | The search for life in the universe Donald Goldsmith ; Tobias Owen |
| title_short | The search for life in the universe |
| title_sort | the search for life in the universe |
| topic | Astrobiologie swd Außerirdisches Leben swd Astronomy Life on other planets Kosmogonie (DE-588)4073736-6 gnd Außerirdisches Leben (DE-588)4003864-6 gnd |
| topic_facet | Astrobiologie Außerirdisches Leben Astronomy Life on other planets Kosmogonie |
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