Course Modules: OpenStax Astronomy

Chapter 1

Chapter 1 Chapter 1

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Chapter Readings 1

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1 Introduction 1 Introduction 2

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1.1 The Nature of Astronomy 1.1 The Nature of Astronomy 3

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1.2 The Nature of Science 1.2 The Nature of Science 4

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1.3 The Laws of Nature 1.3 The Laws of Nature 5

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1.4 Numbers in Astronomy 1.4 Numbers in Astronomy 6

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1.5 Consequences of Light Travel Time 1.5 Consequences of Light Travel Time 7

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1.6 A Tour of the Universe 1.6 A Tour of the Universe 8

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1.7 The Universe on the Large Scale 1.7 The Universe on the Large Scale 9

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1.8 The Universe of the Very Small 1.8 The Universe of the Very Small 10

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1.9 A Conclusion and a Beginning 1.9 A Conclusion and a Beginning 11

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Chapter 2

Chapter 2 Chapter 2

Context Module Sub Header

Chapter Readings 1

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2 Thinking Ahead 2 Thinking Ahead 2

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2.1 The Sky Above 2.1 The Sky Above 3

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2.2 Ancient Astronomy 2.2 Ancient Astronomy 4

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2.3 Astrology and Astronomy 2.3 Astrology and Astronomy 5

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2.4 The Birth of Modern Astronomy 2.4 The Birth of Modern Astronomy 6

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Chapter 3

Chapter 3 Chapter 3

Context Module Sub Header

Chapter Readings 1

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3 Thinking Ahead 3 Thinking Ahead 2

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3.1 The Laws of Planetary Motion 3.1 The Laws of Planetary Motion 3

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3.2 Newton’s Great Synthesis 3.2 Newton’s Great Synthesis 4

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3.3 Newton’s Universal Law of Gravitation 3.3 Newton’s Universal Law of Gravitation 5

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3.4 Orbits in the Solar System 3.4 Orbits in the Solar System 6

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3.5 Motions of Satellites and Spacecraft 3.5 Motions of Satellites and Spacecraft 7

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3.6 Gravity with More Than Two Bodies 3.6 Gravity with More Than Two Bodies 8

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Chapter 4

Chapter 4 Chapter 4

Context Module Sub Header

Chapter Readings 1

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4 Thinking Ahead 4 Thinking Ahead 2

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4.1 Earth and Sky 4.1 Earth and Sky 3

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4.2 The Seasons 4.2 The Seasons 4

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4.3 Keeping Time 4.3 Keeping Time 5

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4.4 The Calendar 4.4 The Calendar 6

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4.5 Phases and Motions of the Moon 4.5 Phases and Motions of the Moon 7

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4.6 Ocean Tides and the Moon 4.6 Ocean Tides and the Moon 8

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4.7 Eclipses of the Sun and Moon 4.7 Eclipses of the Sun and Moon 9

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Chapter 5

Chapter 5 Chapter 5

Context Module Sub Header

Chapter Readings 1

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5 Thinking Ahead 5 Thinking Ahead 2

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5.1 The Behavior of Light 5.1 The Behavior of Light 3

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5.2 The Electromagnetic Spectrum 5.2 The Electromagnetic Spectrum 4

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5.3 Spectroscopy in Astronomy 5.3 Spectroscopy in Astronomy 5

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5.4 The Structure of the Atom 5.4 The Structure of the Atom 6

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5.5 Formation of Spectral Lines 5.5 Formation of Spectral Lines 7

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5.6 The Doppler Effect 5.6 The Doppler Effect 8

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Chapter 6

Chapter 6 Chapter 6

Context Module Sub Header

Chapter Readings 1

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6 Thinking Ahead 6 Thinking Ahead 2

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6.1 Telescopes 6.1 Telescopes 3

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6.2 Telescopes Today 6.2 Telescopes Today 4

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6.3 Visible-Light Detectors and Instruments 6.3 Visible-Light Detectors and Instruments 5

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6.4 Radio Telescopes 6.4 Radio Telescopes 6

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6.5 Observations outside Earth’s Atmosphere 6.5 Observations outside Earth’s Atmosphere 7

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6.6 The Future of Large Telescopes 6.6 The Future of Large Telescopes 8

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Chapter 7

Chapter 7 Chapter 7

Context Module Sub Header

Chapter Readings 1

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7 Thinking Ahead 7 Thinking Ahead 2

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7.1 Overview of Our Planetary System 7.1 Overview of Our Planetary System 3

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7.2 Composition and Structure of Planets 7.2 Composition and Structure of Planets 4

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7.3 Dating Planetary Surfaces 7.3 Dating Planetary Surfaces 5

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7.4 Origin of the Solar System 7.4 Origin of the Solar System 6

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Chapter 8

Chapter 8 Chapter 8

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Chapter Readings 1

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8 Thinking Ahead 8 Thinking Ahead 2

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8.1 The Global Perspective 8.1 The Global Perspective 3

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8.2 Earth’s Crust 8.2 Earth’s Crust 4

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8.3 Earth’s Atmosphere 8.3 Earth’s Atmosphere 5

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8.4 Life, Chemical Evolution, and Climate Change 8.4 Life, Chemical Evolution, and Climate Change 6

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8.5 Cosmic Influences on the Evolution of Earth 8.5 Cosmic Influences on the Evolution of Earth 7

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Chapter 9

Chapter 9 Chapter 9

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Chapter Readings 1

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9 Thinking Ahead 9 Thinking Ahead 2

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9.1 General Properties of the Moon 9.1 General Properties of the Moon 3

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9.2 The Lunar Surface 9.2 The Lunar Surface 4

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9.3 Impact Craters 9.3 Impact Craters 5

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9.4 The Origin of the Moon 9.4 The Origin of the Moon 6

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9.5 Mercury 9.5 Mercury 7

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Chapter 10

Chapter 10 Chapter 10

Context Module Sub Header

Chapter Readings 1

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10 Thinking Ahead 10 Thinking Ahead 2

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External Url

10.1 The Nearest Planets: An Overview 10.1 The Nearest Planets: An Overview 3

external_url 254399 0

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10.2 The Geology of Venus 10.2 The Geology of Venus 4

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10.3 The Massive Atmosphere of Venus 10.3 The Massive Atmosphere of Venus 5

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10.4 The Geology of Mars 10.4 The Geology of Mars 6

external_url 254402 0

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10.5 Water and Life on Mars 10.5 Water and Life on Mars 7

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10.6 Divergent Planetary Evolution 10.6 Divergent Planetary Evolution 8

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Chapter 11

Chapter 11 Chapter 11

Context Module Sub Header

Chapter Readings 1

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External Url

11 Thinking Ahead 11 Thinking Ahead 2

external_url 254406 0

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External Url

11.1 Exploring the Outer Planets 11.1 Exploring the Outer Planets 3

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11.2 The Giant Planets 11.2 The Giant Planets 4

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External Url

11.3 Atmospheres of the Giant Planets 11.3 Atmospheres of the Giant Planets 5

external_url 254409 0

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Chapter 12

Chapter 12 Chapter 12

Context Module Sub Header

Chapter Readings 1

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External Url

12 Thinking Ahead 12 Thinking Ahead 2

external_url 254411 0

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External Url

12.1 Ring and Moon Systems Introduced 12.1 Ring and Moon Systems Introduced 3

external_url 254412 0

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External Url

12.2 The Galilean Moons of Jupiter 12.2 The Galilean Moons of Jupiter 4

external_url 254413 0

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12.3 Titan and Triton 12.3 Titan and Triton 5

external_url 254414 0

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12.4 Pluto and Charon 12.4 Pluto and Charon 6

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External Url

12.5 Planetary Rings 12.5 Planetary Rings 7

external_url 254416 0

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Chapter 13

Chapter 13 Chapter 13

Context Module Sub Header

Chapter Readings 1

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External Url

13 Thinking Ahead 13 Thinking Ahead 2

external_url 254418 0

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External Url

13.1 Asteroids 13.1 Asteroids 3

external_url 254419 0

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13.2 Asteroids and Planetary Defense 13.2 Asteroids and Planetary Defense 4

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External Url

13.3 The “Long-Haired” Comets 13.3 The “Long-Haired” Comets 5

external_url 254421 0

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13.4 The Origin and Fate of Comets and Related Objects 13.4 The Origin and Fate of Comets and Related Objects 6

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Chapter 14

Chapter 14 Chapter 14

Context Module Sub Header

Chapter Readings 1

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External Url

14 Thinking Ahead 14 Thinking Ahead 2

external_url 254424 0

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External Url

14.1 Meteors 14.1 Meteors 3

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14.2 Meteorites: Stones from Heaven 14.2 Meteorites: Stones from Heaven 4

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External Url

14.3 Formation of the Solar System 14.3 Formation of the Solar System 5

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14.4 Comparison with Other Planetary Systems 14.4 Comparison with Other Planetary Systems 6

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External Url

14.5 Planetary Evolution 14.5 Planetary Evolution 7

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Chapter 15

Chapter 15 Chapter 15

Context Module Sub Header

Chapter Readings 1

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External Url

Thinking Ahead Thinking Ahead 2

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External Url

15.1 The Structure and Composition of the Sun 15.1 The Structure and Composition of the Sun 3

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15.2 The Solar Cycle 15.2 The Solar Cycle 4

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15.3 Solar Activity above the Photosphere 15.3 Solar Activity above the Photosphere 5

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External Url

15.4 Space Weather 15.4 Space Weather 6

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Chapter 16

Chapter 16 Chapter 16

Context Module Sub Header

Chapter Readings 1

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External Url

16 Thinking Ahead 16 Thinking Ahead 2

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External Url

16.1 Sources of Sunshine: Thermal and Gravitational Energy 16.1 Sources of Sunshine: Thermal and Gravitational Energy 3

external_url 254438 0

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16.2 Mass, Energy, and the Theory of Relativity 16.2 Mass, Energy, and the Theory of Relativity 4

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External Url

16.3 The Solar Interior: Theory 16.3 The Solar Interior: Theory 5

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External Url

16.4 The Solar Interior: Observations 16.4 The Solar Interior: Observations 6

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Chapter 17

Chapter 17 Chapter 17

Context Module Sub Header

Chapter Readings 1

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17 Thinking Ahead 17 Thinking Ahead 2

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17.1 The Brightness of Stars 17.1 The Brightness of Stars 3

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17.2 Colors of Stars 17.2 Colors of Stars 4

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17.3 The Spectra of Stars (and Brown Dwarfs) 17.3 The Spectra of Stars (and Brown Dwarfs) 5

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17.4 Using Spectra to Measure Stellar Radius, Composition, and Motion 17.4 Using Spectra to Measure Stellar Radius, Composition, and Motion 6

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Chapter 18

Chapter 18 Chapter 18

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Chapter Readings 1

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18 Thinking Ahead 18 Thinking Ahead 2

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18.1 A Stellar Census 18.1 A Stellar Census 3

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18.2 Measuring Stellar Masses 18.2 Measuring Stellar Masses 4

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18.3 Diameters of Stars 18.3 Diameters of Stars 5

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18.4 The H–R Diagram 18.4 The H–R Diagram 6

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Chapter 19

Chapter 19 Chapter 19

Context Module Sub Header

Chapter Readings 1

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19 Thinking Ahead 19 Thinking Ahead 2

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19.1 Fundamental Units of Distance 19.1 Fundamental Units of Distance 3

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19.2 Surveying the Stars 19.2 Surveying the Stars 4

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19.3 Variable Stars: One Key to Cosmic Distances 19.3 Variable Stars: One Key to Cosmic Distances 5

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19.4 The H–R Diagram and Cosmic Distances 19.4 The H–R Diagram and Cosmic Distances 6

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Chapter 20

Chapter 20 Chapter 20

Context Module Sub Header

Chapter Readings 1

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20 Thinking Ahead 20 Thinking Ahead 2

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20.1 The Interstellar Medium 20.1 The Interstellar Medium 3

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20.2 Interstellar Gas 20.2 Interstellar Gas 4

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20.3 Cosmic Dust 20.3 Cosmic Dust 5

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20.4 Cosmic Rays 20.4 Cosmic Rays 6

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20.5 The Life Cycle of Cosmic Material 20.5 The Life Cycle of Cosmic Material 7

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20.6 Interstellar Matter around the Sun 20.6 Interstellar Matter around the Sun 8

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Chapter 21

Chapter 21 Chapter 21

Context Module Sub Header

Chapter Readings 1

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21 Thinking Ahead 21 Thinking Ahead 2

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21.1 Star Formation 21.1 Star Formation 3

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21.2 The H–R Diagram and the Study of Stellar Evolution 21.2 The H–R Diagram and the Study of Stellar Evolution 4

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21.3 Evidence That Planets Form around Other Stars 21.3 Evidence That Planets Form around Other Stars 5

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21.4 Planets beyond the Solar System: Search and Discovery 21.4 Planets beyond the Solar System: Search and Discovery 6

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21.5 Exoplanets Everywhere: What We Are Learning 21.5 Exoplanets Everywhere: What We Are Learning 7

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21.6 New Perspectives on Planet Formation 21.6 New Perspectives on Planet Formation 8

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Chapter 22

Chapter 22 Chapter 22

Context Module Sub Header

Chapter Readings 1

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22 Thinking Ahead 22 Thinking Ahead 2

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22.1 Evolution from the Main Sequence to Red Giants 22.1 Evolution from the Main Sequence to Red Giants 3

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22.2 Star Clusters 22.2 Star Clusters 4

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22.3 Checking Out the Theory 22.3 Checking Out the Theory 5

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22.4 Further Evolution of Stars 22.4 Further Evolution of Stars 6

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22.5 The Evolution of More Massive Stars 22.5 The Evolution of More Massive Stars 7

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Chapter 23

Chapter 23 Chapter 23

Context Module Sub Header

Chapter Readings 1

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23 Thinking Ahead 23 Thinking Ahead 2

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23.1 The Death of Low-Mass Stars 23.1 The Death of Low-Mass Stars 3

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23.2 Evolution of Massive Stars: An Explosive Finish 23.2 Evolution of Massive Stars: An Explosive Finish 4

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23.3 Supernova Observations 23.3 Supernova Observations 5

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23.4 Pulsars and the Discovery of Neutron Stars 23.4 Pulsars and the Discovery of Neutron Stars 6

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23.5 The Evolution of Binary Star Systems 23.5 The Evolution of Binary Star Systems 7

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23.6 The Mystery of the Gamma-Ray Bursts 23.6 The Mystery of the Gamma-Ray Bursts 8

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Chapter 24

Chapter 24 Chapter 24

Context Module Sub Header

Chapter Readings 1

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24 Thinking Ahead 24 Thinking Ahead 2

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24.1 Introducing General Relativity 24.1 Introducing General Relativity 3

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24.2 Spacetime and Gravity 24.2 Spacetime and Gravity 4

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24.3 Tests of General Relativity 24.3 Tests of General Relativity 5

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24.4 Time in General Relativity 24.4 Time in General Relativity 6

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24.5 Black Holes 24.5 Black Holes 7

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24.6 Evidence for Black Holes 24.6 Evidence for Black Holes 8

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24.7 Gravitational Wave Astronomy 24.7 Gravitational Wave Astronomy 9

external_url 254499 0

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Chapter 25

Chapter 25 Chapter 25

Context Module Sub Header

Chapter Readings 1

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External Url

25 Thinking Ahead 25 Thinking Ahead 2

external_url 254501 0

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External Url

25.1 The Architecture of the Galaxy 25.1 The Architecture of the Galaxy 3

external_url 254502 0

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External Url

25.2 Spiral Structure 25.2 Spiral Structure 4

external_url 254503 0

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External Url

25.3 The Mass of the Galaxy 25.3 The Mass of the Galaxy 5

external_url 254504 0

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External Url

25.4 The Center of the Galaxy 25.4 The Center of the Galaxy 6

external_url 254505 0

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25.5 Stellar Populations in the Galaxy 25.5 Stellar Populations in the Galaxy 7

external_url 254506 0

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External Url

25.6 The Formation of the Galaxy 25.6 The Formation of the Galaxy 8

external_url 254507 0

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Chapter 26

Chapter 26 Chapter 26

Context Module Sub Header

Chapter Readings 1

context_module_sub_header 254508 0

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External Url

26 Thinking Ahead 26 Thinking Ahead 2

external_url 254509 0

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External Url

26.1 The Discovery of Galaxies 26.1 The Discovery of Galaxies 3

external_url 254510 0

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External Url

26.2 Types of Galaxies 26.2 Types of Galaxies 4

external_url 254511 0

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External Url

26.3 Properties of Galaxies 26.3 Properties of Galaxies 5

external_url 254512 0

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External Url

26.4 The Extragalactic Distance Scale 26.4 The Extragalactic Distance Scale 6

external_url 254513 0

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External Url

26.5 The Expanding Universe 26.5 The Expanding Universe 7

external_url 254514 0

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Chapter 27

Chapter 27 Chapter 27

Context Module Sub Header

Chapter Readings 1

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External Url

27 Thinking Ahead 27 Thinking Ahead 2

external_url 254516 0

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External Url

27.1 Quasars 27.1 Quasars 3

external_url 254517 0

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External Url

27.2 Supermassive Black Holes: What Quasars Really Are 27.2 Supermassive Black Holes: What Quasars Really Are 4

external_url 254518 0

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External Url

27.3 Quasars as Probes of Evolution in the Universe 27.3 Quasars as Probes of Evolution in the Universe 5

external_url 254519 0

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Chapter 28

Chapter 28 Chapter 28

Context Module Sub Header

Chapter Readings 1

context_module_sub_header 254520 0

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External Url

28 Thinking Ahead 28 Thinking Ahead 2

external_url 254521 0

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External Url

28.1 Observations of Distant Galaxies 28.1 Observations of Distant Galaxies 3

external_url 254522 0

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External Url

28.2 Galaxy Mergers and Active Galactic Nuclei 28.2 Galaxy Mergers and Active Galactic Nuclei 4

external_url 254523 0

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External Url

28.3 The Distribution of Galaxies in Space 28.3 The Distribution of Galaxies in Space 5

external_url 254524 0

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External Url

28.4 The Challenge of Dark Matter 28.4 The Challenge of Dark Matter 6

external_url 254525 0

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External Url

28.5 The Formation and Evolution of Galaxies and Structure in the Universe 28.5 The Formation and Evolution of Galaxies and Structure in the Universe 7

external_url 254526 0

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Chapter 29

Chapter 29 Chapter 29

Context Module Sub Header

Chapter Readings 1

context_module_sub_header 254527 0

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External Url

29 Thinking Ahead 29 Thinking Ahead 2

external_url 254528 0

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External Url

29.1 The Age of the Universe 29.1 The Age of the Universe 3

external_url 254529 0

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External Url

29.2 A Model of the Universe 29.2 A Model of the Universe 4

external_url 254530 0

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External Url

29.3 The Beginning of the Universe 29.3 The Beginning of the Universe 5

external_url 254531 0

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External Url

29.4 The Cosmic Microwave Background 29.4 The Cosmic Microwave Background 6

external_url 254532 0

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External Url

29.5 What Is the Universe Really Made Of? 29.5 What Is the Universe Really Made Of? 7

external_url 254533 0

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External Url

29.6 The Inflationary Universe 29.6 The Inflationary Universe 8

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External Url

29.7 The Anthropic Principle 29.7 The Anthropic Principle 9

external_url 254535 0

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Chapter 30

Chapter 30 Chapter 30

Context Module Sub Header

Chapter Readings 1

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External Url

30 Thinking Ahead 30 Thinking Ahead 2

external_url 254537 0

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External Url

30.1 The Cosmic Context for Life 30.1 The Cosmic Context for Life 3

external_url 254538 0

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External Url

30.2 Astrobiology 30.2 Astrobiology 4

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External Url

30.3 Searching for Life beyond Earth 30.3 Searching for Life beyond Earth 5

external_url 254540 0

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External Url

30.4 The Search for Extraterrestrial Intelligence 30.4 The Search for Extraterrestrial Intelligence 6

external_url 254541 0

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Additional Readings

Additional Readings Additional Readings

External Url

How to Study for an Introductory Astronomy Class How to Study for an Introductory Astronomy Class 1

external_url 254542 0

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External Url

Astronomy Websites, Images, and Apps Astronomy Websites, Images, and Apps 2

external_url 254543 0

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External Url

Scientific Notation Scientific Notation 3

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External Url

Units Used in Science Units Used in Science 4

external_url 254545 0

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Some Useful Constants for Astronomy Some Useful Constants for Astronomy 5

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External Url

Physical and Orbital Data for the Planets Physical and Orbital Data for the Planets 6

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External Url

Selected Moons of the Planets Selected Moons of the Planets 7

external_url 254548 0

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External Url

Future Total Eclipses Future Total Eclipses 8

external_url 254549 0

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The Nearest Stars, Brown Dwarfs, and White Dwarfs The Nearest Stars, Brown Dwarfs, and White Dwarfs 9

external_url 254550 0

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The Brightest Twenty Stars The Brightest Twenty Stars 10

external_url 254551 0

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The Chemical Elements The Chemical Elements 11

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The Constellations The Constellations 12

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External Url

Star Chart and Sky Event Resources Star Chart and Sky Event Resources 13

external_url 254554 0

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