Astronomy by OpenStax (hardcover version, full color)

1206 Pages·2016·38.94 MB·English

by  Andrew Fraknoi: Foothill College, David Morrison: National Aeronautics and Space Administration, Sidney C. Wolff: National Optical Astronomy Observatory (Emeritus)

Astronomy
SENIOR CONTRIBUTING AUTHORS
ANDREW FRAKNOI, FOOTHILL COLLEGE
DAVID MORRISON, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
SIDNEY C. WOLFF, NATIONAL OPTICAL ASTRONOMY OBSERVATORY (EMERITUS)
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Original Publication Year 2016
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TABLE OF CONTENTS
Preface 1
1 Science and the Universe: A Brief Tour 11
1.1 The Nature of Astronomy 13
1.2 The Nature of Science 13
1.3 The Laws of Nature 15
1.4 Numbers in Astronomy 15
1.5 Consequences of Light Travel Time 17
1.6 A Tour of the Universe 18
1.7 The Universe on the Large Scale 23
1.8 The Universe of the Very Small 27
1.9 A Conclusion and a Beginning 28
2 Observing the Sky: The Birth of Astronomy 31
2.1 The Sky Above 32
2.2 Ancient Astronomy 42
2.3 Astrology and Astronomy 49
2.4 The Birth of Modern Astronomy 54
3 Orbits and Gravity 69
3.1 The Laws of Planetary Motion 70
3.2 Newton’s Great Synthesis 76
3.3 Newton’s Universal Law of Gravitation 81
3.4 Orbits in the Solar System 85
3.5 Motions of Satellites and Spacecraft 88
3.6 Gravity with More Than Two Bodies 91
4 Earth, Moon, and Sky 103
4.1 Earth and Sky 104
4.2 The Seasons 107
4.3 Keeping Time 114
4.4 The Calendar 117
4.5 Phases and Motions of the Moon 120
4.6 Ocean Tides and the Moon 125
4.7 Eclipses of the Sun and Moon 129
5 Radiation and Spectra 145
5.1 The Behavior of Light 146
5.2 The Electromagnetic Spectrum 153
5.3 Spectroscopy in Astronomy 161
5.4 The Structure of the Atom 166
5.5 Formation of Spectral Lines 172
5.6 The Doppler Effect 176
6 Astronomical Instruments 189
6.1 Telescopes 190
6.2 Telescopes Today 196
6.3 Visible-Light Detectors and Instruments 206
6.4 Radio Telescopes 210
6.5 Observations outside Earth’s Atmosphere 217
6.6 The Future of Large Telescopes 222
7 Other Worlds: An Introduction to the Solar System 233
7.1 Overview of Our Planetary System 234
7.2 Composition and Structure of Planets 246
7.3 Dating Planetary Surfaces 251
7.4 Origin of the Solar System 254
8 Earth as a Planet 265
8.1 The Global Perspective 266
8.2 Earth’s Crust 270
8.3 Earth’s Atmosphere 278
8.4 Life, Chemical Evolution, and Climate Change 283
8.5 Cosmic Influences on the Evolution of Earth 288
9 Cratered Worlds 303
9.1 General Properties of the Moon 303
9.2 The Lunar Surface 310
9.3 Impact Craters 315
9.4 The Origin of the Moon 320
9.5 Mercury 321
10 Earthlike Planets: Venus and Mars 335
10.1 The Nearest Planets: An Overview 335
10.2 The Geology of Venus 342
10.3 The Massive Atmosphere of Venus 347
10.4 The Geology of Mars 350
10.5 Water and Life on Mars 359
10.6 Divergent Planetary Evolution 371
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11 The Giant Planets 381
11.1 Exploring the Outer Planets 381
11.2 The Giant Planets 387
11.3 Atmospheres of the Giant Planets 393
12 Rings, Moons, and Pluto 409
12.1 Ring and Moon Systems Introduced 410
12.2 The Galilean Moons of Jupiter 411
12.3 Titan and Triton 420
12.4 Pluto and Charon 425
12.5 Planetary Rings 432
13 Comets and Asteroids: Debris of the Solar System 451
13.1 Asteroids 452
13.2 Asteroids and Planetary Defense 463
13.3 The “Long-Haired” Comets 466
13.4 The Origin and Fate of Comets and Related Objects 476
14 Cosmic Samples and the Origin of the Solar System 493
14.1 Meteors 494
14.2 Meteorites: Stones from Heaven 499
14.3 Formation of the Solar System 504
14.4 Comparison with Other Planetary Systems 510
14.5 Planetary Evolution 515
15 The Sun: A Garden-Variety Star 527
15.1 The Structure and Composition of the Sun 528
15.2 The Solar Cycle 539
15.3 Solar Activity above the Photosphere 544
15.4 Space Weather 548
16 The Sun: A Nuclear Powerhouse 563
16.1 Sources of Sunshine: Thermal and Gravitational Energy 563
16.2 Mass, Energy, and the Theory of Relativity 566
16.3 The Solar Interior: Theory 576
16.4 The Solar Interior: Observations 582
17 Analyzing Starlight 595
17.1 The Brightness of Stars 595
17.2 Colors of Stars 599
17.3 The Spectra of Stars (and Brown Dwarfs) 602
17.4 Using Spectra to Measure Stellar Radius, Composition, and Motion 609
18 The Stars: A Celestial Census 625
18.1 A Stellar Census 625
18.2 Measuring Stellar Masses 629
18.3 Diameters of Stars 636
18.4 The H–R Diagram 641
19 Celestial Distances 659
19.1 Fundamental Units of Distance 659
19.2 Surveying the Stars 663
19.3 Variable Stars: One Key to Cosmic Distances 672
19.4 The H–R Diagram and Cosmic Distances 679
20 Between the Stars: Gas and Dust in Space 691
20.1 The Interstellar Medium 692
20.2 Interstellar Gas 696
20.3 Cosmic Dust 704
20.4 Cosmic Rays 711
20.5 The Life Cycle of Cosmic Material 714
20.6 Interstellar Matter around the Sun 716
21 The Birth of Stars and the Discovery of Planets outside the 727
Solar System
21.1 Star Formation 728
21.2 The H–R Diagram and the Study of Stellar Evolution 737
21.3 Evidence That Planets Form around Other Stars 740
21.4 Planets beyond the Solar System: Search and Discovery 744
21.5 Exoplanets Everywhere: What We Are Learning 753
21.6 New Perspectives on Planet Formation 759
22 Stars from Adolescence to Old Age 771
22.1 Evolution from the Main Sequence to Red Giants 772
22.2 Star Clusters 778
22.3 Checking Out the Theory 782
22.4 Further Evolution of Stars 789
22.5 The Evolution of More Massive Stars 798
This OpenStax book is available for free at http://cnx.org/content/col11992/1.13