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| Looking Up Illustrations | |
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| Preface | |
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| the Cosmic Landscape | |
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| Our Planetary Neighborhood | |
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| Beyond the Solar System | |
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| Astronomical Numbers | |
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| Foundations of Astronomy | |
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| The Night Sky | |
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| The Year | |
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| The Time of Day | |
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| Lunar Cycles | |
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| Calendars | |
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| Geometry of the Earth, Moon, and Sun | |
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| Planets: The Wandering Stars | |
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| The Beginnings of Modern Astronomy | |
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| Observing the Sky | |
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| Probing Matter, Light, and Their Interactions | |
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| Astronomical Motion: Inertia, Mass, and Force | |
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| Force, Acceleration, and Interaction | |
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| The Universal Law of Gravity | |
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| Measuring a Body's Mass Using Orbital Motion | |
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| Orbital and Escape Velocities | |
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| Tides | |
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| Conservation Laws | |
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| The Dual Nature of Light and Matter | |
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| The Electromagnetic Spectrum | |
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| Thermal Radiation | |
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| Identifying Atoms by Their Spectra | |
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| The Doppler Shift | |
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| Special Relativity | |
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| General Relativity | |
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| Detecting Light | |
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| Collecting Light | |
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| Focusing Light | |
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| Telescope Resolution | |
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| The Earth's Atmosphere and Space Observatories | |
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| Amateur Astronomy | |
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| The Solar System | |
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| The Structure of the Solar System | |
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| The Origin of the Solar System | |
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| Other Planetary Systems | |
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| The Earth as a Terrestrial Planet | |
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| Earth's Atmosphere and Hydrosphere | |
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| Our Moon | |
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| Mercury | |
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| Venus | |
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| Mars | |
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| Asteroids | |
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| Comparative Planetology | |
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| Jupiter and Saturn | |
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| Uranus and Neptune | |
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| Satellite Systems and Rings | |
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| Ice Worlds, Pluto, and Beyond | |
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| Comets | |
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| Impacts on Earth | |
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| Stars and Stellar Evolution | |
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| The Sun, Our Star | |
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| The Sun's Source of Power | |
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| Solar Activity | |
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| Surveying the Stars | |
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| The Luminosities of Stars | |
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| The Temperatures and Compositions of Stars | |
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| The Masses of Orbiting Stars | |
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| The Sizes of Stars | |
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| The H-R Diagram | |
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| Overview of Stellar Evolution | |
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| Star Formation | |
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| Main-Sequence Stars | |
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| Giant Stars | |
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| Variable Stars | |
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| Mass Loss and Death of Low-Mass Stars | |
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| Exploding White Dwarfs | |
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| Old Age and Death of Massive Stars | |
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| Neutron Stars | |
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| Black Holes | |
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| Star Clusters | |
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| Galaxies and the Universe | |
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| Discovering the Milky Way | |
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| Stars of the Milky Way | |
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| Gas and Dust in the Milky Way | |
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| Mass and Motions in the Milky Way | |
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| A Universe of Galaxies | |
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| Types of Galaxies | |
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| Galaxy Clustering | |
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| Active Galactic Nuclei | |
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| Dark Matter | |
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| Cosmology | |
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| The Edges of the Universe | |
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| The Curvature of the Universe | |
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| The Beginnings of the Universe | |
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| Dark Energy and the Fate of the Universe | |
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| Astrobiology | |
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| The Search for Life Elsewhere | |
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| Answers to Test Yourself Questions | |
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| Glossary | |
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| Credits | |
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| Index | |