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21st Century Astronomy and Learning Astronomy by Doing Astronomy 5th ed. [Multiple-component retail product]

(Barnard College), (Barnard College), (University of California Santa Cruz), (Barnard College)
  • Formatas: Multiple-component retail product, 700 pages, aukštis x plotis x storis: 274x244x36 mm, weight: 2252 g, Contains 1 Paperback / softback
  • Išleidimo metai: 09-Jun-2016
  • Leidėjas: W. W. Norton & Company
  • ISBN-10: 0393613364
  • ISBN-13: 9780393613360
Kitos knygos pagal šią temą:
21st Century Astronomy and Learning Astronomy by Doing Astronomy 5th ed.
  • Formatas: Multiple-component retail product, 700 pages, aukštis x plotis x storis: 274x244x36 mm, weight: 2252 g, Contains 1 Paperback / softback
  • Išleidimo metai: 09-Jun-2016
  • Leidėjas: W. W. Norton & Company
  • ISBN-10: 0393613364
  • ISBN-13: 9780393613360
Kitos knygos pagal šią temą:
Influenced by astronomy education research, 21st Century Astronomy offers a complete pedagogical and media package that facilitates learning by doing, while the new one-column design makes the Fifth Edition the most accessible introductory text available today.Written by two expert teachers and based on astronomy education research, Learning Astronomy by Doing Astronomy guides students through concepts, promotes quantitative literacy, and increases student confidence in their understanding of how the universe works.

A textbook that facilitates learning by doing.
Preface xxi
About the Authors xxxii
PART I Introduction to Astronomy
Chapter 1 Thinking Like an Astronomer
2(20)
1.1 Earth Occupies a Small Place in the Universe
4(3)
1.2 Science Is a Way of Viewing the Universe
7(5)
Process of Science The Scientific Method
9(3)
1.3 Astronomers Use Mathematics to Find Patterns
12(10)
Working It Out 1.1 Mathematical Tools
13(1)
Working It Out 1.2 Reading a Graph
14(1)
Origins An Introduction
15(1)
Reading Astronomy News Probe Detects Southern Sea Under Ice on Saturnian Moon Enceladus
16(1)
Summary
17(1)
Unanswered Questions
17(1)
Questions and Problems
18(3)
Exploration: Logical Fallacies
21(1)
Chapter 2 Patterns in the Sky---Motions of Earth and the Moon
22(36)
2.1 Earth Spins on Its Axis
24(9)
Working It Out 2.1 How to Estimate the Size of Earth
31(2)
2.2 Revolution about the Sun Leads to Changes during the Year
33(7)
Process of Science Theories Must Fit All the Known Facts
37(3)
2.3 The Moon's Appearance Changes as It Orbits Earth
40(3)
2.4 Calendars Are Based on the Day, Month, and Year
43(2)
2.5 Eclipses Result from the Alignment of Earth, Moon, and the Sun
45(13)
Origins The Obliquity of Earth
51(1)
Reading Astronomy News Thousands Expected in Hopkinsville for 2017 Solar Eclipse
52(1)
Summary
53(1)
Unanswered Question
53(1)
Questions and Problems
54(3)
Exploration: The Phases of the Moon
57(1)
Chapter 3 Motion of Astronomical Bodies
58(24)
3.1 The Motions of Planets in the Sky
60(4)
Working It Out 3.1 How Copernicus Computed Orbital Periods and Scaled the Solar System
64(1)
3.2 Kepler's Laws Describe Planetary Motion
64(5)
Process of Science Theories Are Falsifiable
67(1)
Working It Out 3.2 Kepler's Third Law
68(1)
3.3 Galileo's Observations Supported the Heliocentric Model
69(2)
3.4 Newton's Three Laws Help to Explain the Motion of Celestial Bodies
71(11)
Working It Out 3.3 Using Newton's Laws
74(1)
Origins Planets and Orbits
75(1)
Reading Astronomy News NASA Spacecraft Take Spring Break at Mars
76(1)
Summary
77(1)
Unanswered Questions
77(1)
Questions and Problems
77(4)
Exploration: Kepler's Laws
81(1)
Chapter 4 Gravity and Orbits
82(26)
4.1 Gravity Is a Force between Any Two Objects Due to Their Masses
84(5)
Working It Out 4.1 Playing with Newton's Laws of Motion and Gravitation
87(2)
4.2 An Orbit Is One Body "Falling around" Another
89(6)
Process of Science Universality
91(3)
Working It Out 4.2 Circular Velocity and Escape Velocity
94(1)
Working It Out 4.3 Calculating Mass from Orbital Periods
95(1)
4.3 Tidal Forces Are Caused by Gravity
95(4)
Working It Out 4.4 Tidal Forces
98(1)
4.4 Tidal Forces Affect Solid Bodies
99(9)
Origins Tidal Forces and Life
101(1)
Reading Astronomy News Exploding Stars Prove Newton's Law of Gravity Unchanged over Cosmic Time
102(1)
Summary
103(1)
Unanswered Question
103(1)
Questions and Problems
103(4)
Exploration: Newton's Laws
107(1)
Chapter 5 Light
108(34)
5.1 Light Brings Us the News of the Universe
110(7)
Process of Science Agreement between Fields
116(1)
Working It Out 5.1 Working with Electromagnetic Radiation
117(1)
5.2 The Quantum View of Matter Explains Spectral Lines
117(8)
5.3 The Doppler Shift Indicates Motion Toward or Away from Us
125(2)
Working It Out 5.2 Making Use of the Doppler Effect
127(1)
5.4 Temperature Affects the Spectrum of Light That an Object Emits
127(5)
Working It Out 5.3 Working with the Stefan-Boltzmann Law and Wien's Law
132(1)
5.5 The Brightness of Light Depends on the Luminosity and Distance of the Light Source
132(10)
Working It Out 5.4 Using Radiation Laws to Calculate Equilibrium Temperatures of Planets
134(1)
Origins Temperatures of Planets
135(1)
Reading Astronomy News A Study in Scarlet
136(1)
Summary
137(1)
Unanswered Questions
137(1)
Questions and Problems
137(4)
Exploration: Light as a Wave, Light as a Photon
141(1)
Chapter 6 The Tools of the Astronomer
142(30)
6.1 The Optical Telescope Revolutionized Astronomy
144(8)
Working It Out 6.1 Telescope Aperture and Magnification
146(4)
Working It Out 6.2 Diffraction Limit
150(2)
6.2 Optical Detectors and Instruments Used with Telescopes
152(3)
6.3 Astronomers Observe in Wavelengths Beyond the Visible
155(4)
6.4 Planetary Spacecraft Explore the Solar System
159(2)
6.5 Other Tools Contribute to the Study of the Universe
161(11)
Process of Science Technology and Science Are Symbiotic
163(2)
Origins Microwave Telescopes Detect Radiation from the Big Bang
165(1)
Reading Astronomy News Big Mirrors, High Hopes: Extremely Large Telescope is a Go
166(1)
Summary
167(1)
Unanswered Questions
167(1)
Questions and Problems
168(3)
Exploration: Geometric Optics and Lenses
171(1)
PART II The Solar System
Chapter 7 The Birth and Evolution of Planetary Systems
172(28)
7.1 Planetary Systems Form around a Star
174(3)
Process of Science Converging Lines of Inquiry
176(1)
7.2 The Solar System Began with a Disk
177(4)
Working It Out 7.1 Angular Momentum
180(1)
7.3 The Inner Disk and Outer Disk Formed at Different Temperatures
181(4)
7.4 The Formation of Our Solar System
185(2)
7.5 Planetary Systems Are Common
187(13)
Working It Out 7.2 Estimating the Size of the Orbit of a Planet
189(1)
Working It Out 7.3 Estimating the Radius of an Extrasolar Planet
190(3)
Origins Kepler's Search for Earth-Sized Planets
193(1)
Reading Astronomy News Earth-Size Planet Found in the "Habitable Zone" of Another Star
194(1)
Summary
195(1)
Unanswered Questions
195(1)
Questions and Problems
196(3)
Exploration: Exploring Extrasolar Planets
199(1)
Chapter 8 The Terrestrial Planets and Earth's Moon
200(34)
8.1 Impacts Help Shape the Evolution of the Planets
202(5)
Process of Science Certainty Is Sometimes Out of Reach
206(1)
8.2 Radioactive Dating Tells Us the Age of the Moon and the Solar System
207(2)
Working It Out 8.1 Computing the Ages of Rocks
208(1)
8.3 The Surface of a Terrestrial Planet Is Affected by Processes in the Interior
209(5)
Working It Out 8.2 How Planets Cool Off
212(2)
8.4 Planetary surfaces Evolve through Tectonism
214(5)
8.5 Volcanism Signifies a Geologically Active Planet
219(3)
8.6 The Geological Evidence for Water
222(12)
Origins The Death of the Dinosaurs
227(1)
Reading Astronomy News Did Volcanoes Erupt on the Moon while Dinosaurs Roamed Earth?
228(1)
Summary
229(1)
Unanswered Questions
229(1)
Questions and Problems
230(3)
Exploration: Exponential Behavior
233(1)
Chapter 9 Atmospheres of the Terrestrial Planets
234(34)
9.1 Atmospheres Change over Time
236(2)
9.2 Secondary Atmospheres Evolve
238(5)
Working It Out 9.1 Atmosphere Retention
239(4)
9.3 Earth's Atmosphere Has Detailed Structure
243(8)
9.4 The Atmospheres of Venus and Mars Differ from Earth's
251(4)
9.5 Greenhouse Gases Affect Global Climates
255(13)
Process of Science Thinking about Complexity
259(1)
Origins Our Special Planet
260(1)
Reading Astronomy News Mars Once Had an Entire Ocean---and then Lost It, Scientists Say
261(1)
Summary
262(1)
Unanswered Questions
262(1)
Questions and Problems
263(4)
Exploration: Climate Change
267(1)
Chapter 10 Worlds of Gas and Liquid---The Giant Planets
268(28)
10.1 The Giant Planets Are Large, Cold, and Massive
270(5)
Process of Science Scientific Laws Make Testable Predictions
272(3)
10.2 The Giant Planets Have Clouds and Weather
275(6)
Working It Out 10.1 Measuring Wind Speeds on Different Planets
280(1)
10.3 The Interiors of the Giant Planets Are Hot and Dense
281(2)
Working It Out 10.2 Internal Thermal Energy Heats the Giant Planets
282(1)
10.4 The Giant Planets Are Magnetic Powerhouses
283(4)
10.5 The Planets of Our Solar System Might Not Be Typical
287(9)
Origins Giant Planet Migration and the Inner Solar System
289(1)
Reading Astronomy News Hubble Sees Jupiter's Red Spot Shrink to Smallest Size Ever
290(1)
Summary
291(1)
Unanswered Questions
291(1)
Questions and Problems
292(3)
Exploration: Estimating Rotation Periods of the Giant Planets
295(1)
Chapter 11 Planetary Moons and Rings
296(30)
11.1 Many Solar System Planets Have Moons
298(3)
Working It Out 11.1 Using Moons to Compute the Mass of a Planet
300(1)
11.2 Some Moons Have Geological Activity and Water
301(7)
Working It Out 11.2 Tidal Forces on the Moons
303(5)
11.3 Rings Surround the Giant Planets
308(4)
Working It Out 11.3 Feeding the Rings
312(1)
11.4 Ring Systems Have a Complex Structure
312(14)
Process of Science Following Up on the Unexpected
315(4)
Origins Extreme Environments
319(1)
Reading Astronomy News Possible New Moon Forming around Saturn
320(1)
Summary
321(1)
Unanswered Questions
321(1)
Questions and Problems
322(3)
Exploration: Measuring Features on lo
325(1)
Chapter 12 Dwarf Planets and Small Solar System Bodies
326(32)
12.1 Dwarf Planets May Outnumber Planets
328(4)
Process of Science How to Classify Pluto
330(1)
Working It Out 12.1 Eccentric Orbits
331(1)
12.2 Asteroids Are Pieces of the Past
332(5)
12.3 Comets Are Clumps of Ice
337(7)
12.4 Meteorites Are Remnants of the Early Solar System
344(4)
12.5 Collisions Still Happen Today
348(10)
Working It Out 12.2 Impact Energy
350(1)
Origins Comets, Asteroids, Meteoroids, and Life
351(1)
Reading Astronomy News Rosetta Spacecraft Finds Water on Earth Didn't Come from Comets
352(1)
Summary
353(1)
Unanswered Questions
353(1)
Questions and Problems
354(3)
Exploration: Asteroid Discovery
357(1)
PART III Stars and Stellar Evolution
Chapter 13 Taking the Measure of Stars
358(32)
13.1 Astronomers Measure the Distance, Brightness, and Luminosity of Stars
360(5)
Working It Out 13.1 Parallax and Distance
363(1)
Working It Out 13.2 The Magnitude System
364(1)
13.2 Astronomers Can Determine the Temperature, Size, and Composition of Stars
365(6)
Working It Out 13.3 Estimating the Sizes of Stars
370(1)
13.3 Measuring the Masses of Stars in Binary Systems
371(5)
Working It Out 13.4 Measuring the Mass of an Eclipsing Binary Pair
374(2)
13.4 The Hertzsprung-Russell Diagram Is the Key to Understanding Stars
376(14)
Process of Science Science Is Collaborative
378(4)
Origins Habitable Zones
382(1)
Reading Astronomy News NASA's Hubble Extends Stellar Tape Measure 10 Times Farther into Space
383(1)
Summary
384(1)
Unanswered Questions
385(1)
Questions and Problems
385(4)
Exploration: The H-R Diagram
389(1)
Chapter 14 Our Star---The Sun
390(30)
14.1 The Sun Is Powered by Nuclear Fusion
392(5)
Working It Out 14.1 The Source of the Sun's Energy
394(3)
14.2 Energy Is Transferred from the Interior of the Sun
397(6)
Process of Science Learning from Failure
401(2)
14.3 The Atmosphere of the Sun
403(2)
14.4 The Atmosphere of the Sun Is Very Active
405(15)
Working It Out 14.2 Sunspots and Temperature
407(5)
Origins The Solar Wind and Life
412(1)
Reading Astronomy News Carrington-Class CME Narrowly Misses Earth
413(1)
Summary
414(1)
Unanswered Questions
414(1)
Questions and Problems
415(4)
Exploration: The Proton-Proton Chain
419(1)
Chapter 15 The Interstellar Medium and Star Formation
420(28)
15.1 The Interstellar Medium Fills the Space between the Stars
422(8)
Working It Out 15.1 Dust Glows in the Infrared
425(4)
Process of Science All Branches of Science Are Interconnected
429(1)
15.2 Molecular Clouds Are the Cradles of Star Formation
430(2)
15.3 Formation and Evolution of Protostars
432(4)
15.4 Evolution Before the Main Sequence
436(12)
Working It Out 15.2 Luminosity, Surface Temperature, and Radius of Protostars
438(3)
Origins Star Formation, Planets, and Life
441(1)
Reading Astronomy News Interstellar Dust Discovered Inside NASA Spacecraft
442(1)
Summary
443(1)
Unanswered Questions
443(1)
Questions and Problems
444(3)
Exploration: The Stellar Thermostat
447(1)
Chapter 16 Evolution of Low-Mass Stars
448(30)
16.1 The Life of a Main-Sequence Star Depends on Its Mass
450(3)
Working It Out 16.1 Estimating Main-Sequence Lifetimes
452(1)
16.2 The Star Leaves the Main Sequence
453(3)
16.3 Helium Burns in the Degenerate Core
456(4)
16.4 Dying Stars Shed Their Outer Layers
460(6)
Working It Out 16.2 Escaping the Surface of an Evolved Star
461(5)
16.5 Binary Star Evolution
466(12)
Process of Science Science Is Not Finished
470(1)
Origins Stellar Lifetimes and Biological Evolution
471(1)
Reading Astronomy News Scientists Solve Riddle of Celestial Archaeology
472(1)
Summary
473(1)
Unanswered Questions
473(1)
Questions and Problems
474(3)
Exploration: Low-Mass Stellar Evolution
477(1)
Chapter 17 Evolution of High-Mass Stars
478(28)
17.1 High-Mass Stars Follow Their Own Path
480(4)
17.2 High-Mass Stars Go Out with a Bang
484(5)
Working It Out 17.1 Binding Energy of Atomic Nuclei
485(4)
17.3 The Spectacle and Legacy of Supernovae
489(6)
Working It Out 17.2 Gravity on a Neutron Star
491(3)
Process of Science Occam's Razor
494(1)
17.4 Star Clusters Are Snapshots of Stellar Evolution
495(11)
Origins Seeding the Universe with New Chemical Elements
499(1)
Reading Astronomy News We Are Swimming in a Superhot Supernova Soup
500(1)
Summary
501(1)
Unanswered Questions
501(1)
Questions and Problems
501(4)
Exploration: The CNO Cycle
505(1)
Chapter 18 Relativity and Black Holes
506(28)
18.1 Relative Motion Affects Measured Velocities
508(2)
18.2 Special Relativity Explains How Time and Space Are Related
510(5)
Working It Out 18.1 Time Dilation
514(1)
18.3 Gravity Is a Distortion of Spacetime
515(8)
Process of Science New Science Can Encompass the Old
520(3)
18.4 Black Holes
523(11)
Working It Out 18.2 Masses in X-Ray Binaries
526(1)
Origins Gamma-Ray Bursts
527(1)
Reading Astronomy News After Neutron Star Death-Match, a Black Hole Is Born
528(1)
Summary
529(1)
Unanswered Questions
529(1)
Questions and Problems
530(3)
Exploration: Black Holes
533(1)
PART IV Galaxies, the Universe, and Cosmology
Chapter 19 Galaxies
534(30)
19.1 Galaxies Come in Different Shapes and Sizes
536(6)
19.2 Astronomers Use Several Methods to Find Distances to Galaxies
542(4)
Working It Out 19.1 Finding the Distance from a Type la Supernova
544(2)
Working It Out 19.2 Redshift---Calculating the Recession Velocity and Distance of Galaxies
546(1)
19.3 Galaxies Are Mostly Dark Matter
546(3)
19.4 Most Galaxies Have a Supermassive Black Hole at the Center
549(15)
Working It Out 19.3 The Size, Density, and Power of a Supermassive Black Hole
553(2)
Process of Science Finding the Common Thread
555(2)
Origins Habitability in Galaxies
557(1)
Reading Astronomy News Hubble Helps Find Smallest Known Galaxy with a Supermassive Black Hole
558(1)
Summary
559(1)
Unanswered Questions
559(1)
Questions and Problems
560(3)
Exploration: Galaxy Classification
563(1)
Chapter 20 The Milky Way---A Normal Spiral Galaxy
564(26)
20.1 Astronomers Have Measured the Size and Structure of the Milky Way
566(4)
20.2 The Components of the Milky Way Provide Clues about the Formation of Spiral Galaxies
570(6)
Process of Science Unknown Unknowns
571(5)
20.3 Most of the Milky Way Is Unseen
576(4)
Working It Out 20.1 The Mass of the Milky Way inside the Sun's Orbit
578(1)
Working It Out 20.2 The Mass of the Milky Way's Central Black Hole
579(1)
20.4 The History and Future of the Milky Way
580(10)
Origins The Galactic Habitable Zone
583(1)
Reading Astronomy News Dark Matter Half What We Thought, Say Scientists
584(1)
Summary
585(1)
Unanswered Questions
585(1)
Questions and Problems
586(3)
Exploration: The Center of the Milky Way
589(1)
Chapter 21 The Expanding Universe
590(26)
21.1 The Cosmological Principle
592(5)
Process of Science Data Are the Ultimate Authority
596(1)
21.2 The Universe Began in the Big Bang
597(4)
Working It Out 21.1 Expansion and the Age of the Universe
598(3)
21.3 Expansion Is Described with a Scale Factor
601(3)
Working It Out 21.2 When Redshift Exceeds One
603(1)
21.4 Astronomers Observe Cosmic Microwave Background Radiation
604(12)
Origins Big Bang Nucleosynthesis
608(2)
Reading Astronomy News 50th Anniversay of the Big Bang Discovery
610(1)
Summary
611(1)
Unanswered Questions
611(1)
Questions and Problems
611(4)
Exploration: Hubble's Law for Balloons
615(1)
Chapter 22 Cosmology
616(30)
22.1 Gravity and the Expansion of the Universe
618(2)
Working It Out 22.1 Calculating the Critical Density
619(1)
22.2 The Accelerating Universe
620(6)
Process of Science Never Throw Anything Away
622(4)
22.3 Inflation Solves Several Problems in Cosmology
626(3)
22.4 The Earliest Moments of the Universe Connect the Very Largest Size Scales to the Very Smallest
629(7)
Working It Out 22.2 Pair Production in the Early Universe
632(4)
22.5 String Theory and Multiverses
636(10)
Origins Our Own Universe Must Support Life
639(1)
Reading Astronomy News Cosmic Inflation: How Progress in Science Is Achieved
640(1)
Summary
641(1)
Unanswered Questions
641(1)
Questions and Problems
641(4)
Exploration: Studying Particles
645(1)
Chapter 23 Large-Scale Structure in the Universe
646(28)
23.1 Galaxies Form Groups, Clusters, and Larger Structures
648(3)
Working It Out 23.1 Mass of a Cluster of Galaxies
650(1)
23.2 Gravity Forms Large-Scale Structure
651(6)
Process of Science Multiple Streams of Evidence
656(1)
23.3 First Light of Stars and Galaxies
657(5)
Working It Out 23.2 Observing High-Redshift Objects
660(2)
23.4 Galaxies Evolve
662(12)
Origins We Are the 4 or 5 Percent
667(1)
Reading Astronomy News Welcome to Laniakea, Your Galactic Supercluster Home
668(1)
Summary
669(1)
Unanswered Questions
669(1)
Questions and Problems
669(4)
Exploration: The Story of a Proton
673(1)
Chapter 24 Life
674(2)
24.1 Life Evolves on Earth
676(5)
Working It Out 24.1 Exponential Growth
680(1)
24.2 Life Involves Complex Chemical Processes
681(3)
Process of Science All of Science Is Interconnected
682(2)
24.3 Where Do Astronomers Look for Life?
684(5)
24.4 Scientists Are Searching for Signs of Intelligent Life
689(1)
Working It Out 24.2 Putting Numbers into the Drake Equation
690(2)
Origins The Fate of Life on Earth
692(2)
Reading Astronomy News Finding Life Beyond Earth Is within Reach
694(1)
Summary
695(1)
Unanswered Questions
695(1)
Questions and Problems
696(3)
Exploration: Fermi Problems and the Drake Equation
699
Appendix 1 Mathematical Tools 1(5)
Appendix 2 Physical Constants and Units 6(2)
Appendix 3 Periodic Table of the Elements 8(1)
Appendix 4 Properties of Planets, Dwarf Planets, and Moons 9(4)
Appendix 5 Space Missions 13(2)
Appendix 6 Nearest and Brightest Stars 15(3)
Appendix 7 Observing the Sky 18(9)
Appendix 8 Uniform Circular Motion and Circular Orbits 27(2)
Appendix 9 IAU 2006 Resolutions: "Definition of a Planet in the Solar System" and "Pluto" 29
Glossary 1(1)
Selected Answers 1(1)
Credits 1(1)
Index 1(152)
About the Authors ix
Preface xi
Acknowledgments xiii
Activity 1 Mathematical and Scientific Methods
1(8)
Activity 2 Astronomical Measurements: Examples from Astronomical Research
9(6)
Activity 3 Where on Earth Are You?
15(4)
Activity 4 Studying the Phases of the Moon from a Privileged View
19(6)
Activity 5 Altitudes of Objects on the Meridian at Your Location
25(2)
Activity 6 Working with Kepler's Laws
27(4)
Activity 7 Extraterrestrial Tourism
31(4)
Activity 8 Light and Spectra
35(6)
Activity 9 Where to Put the Telescope?
41(2)
Activity 10 51 Pegasi: The Discovery of a New Planet
43(4)
Activity 11 Ranking Task for Formation of Planetary Systems
47(2)
Activity 12 Age Dating the Lunar Surface Using Cratering Statistics
49(6)
Activity 13 Comparison of Storms on Jupiter and Earth
55(4)
Activity 14 The Clearing and Herding of Saturn's Ring Particles
59(4)
Activity 15 Moons of the Giant Planets
63(4)
Activity 16 Classifying Meteorites
67(4)
Activity 17 Spectral Classification of Stars
71(8)
Activity 18 Finding Distances to Stars Using Parallax Measurements
79(6)
Activity 19 Analyzing a Coronal Mass Ejection from the Sun
85(4)
Activity 20 The Stuff Between the Stars
89(4)
Activity 21 Investigating the Crab Nebula and Pulsar
93(4)
Activity 22 Determining Ages of Star Clusters
97(6)
Activity 23 Bent Space and Black Holes
103(6)
Activity 24 Light Travel Time and the Size of a Quasar
109(4)
Activity 25 RR Lyrae Stars and the Distance to the Center of the Galaxy
113(6)
Activity 26 Finding the Expansion Rate and the Age of the Universe
119(10)
Activity 27 A Cosmic Calendar
129(8)
Activity 28 The Hubble Deep Field North
137(6)
Activity 29 Calculating the Mass of the Central Object of the Galaxy
143(4)
Activity 30 Habitable Worlds
147(6)
Credits 153(2)
Index 155