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The Solar System 15th edition

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Michael A. Seeds, Dana E. Backman, and Eric Wegryn
Publisher: Cengage Learning

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  • Seeds The Solar System 15e

Access is contingent on use of this textbook in the instructor's classroom.

  • Chapter 1: Here and Now
    • 1.1: Where Are We?
    • 1.2: When Is Now?
    • 1.3: Why Study Astronomy?
    • 1: Review Questions (16)
    • 1: Problems (13)
    • 1: Optimized Problems (6)
    • 1: Learning to Look (5)
    • 1: General Problems (4)
    • 1: Review Exercises
    • 1: Ranking Task Exercises (4)
    • 1: Animation Tutorial
    • 1: Waypoint
    • 1: Tutorial (2)
    • 1: Extra Problems (13)

  • Chapter 2: A Guide to the Sky
    • 2.1: The Stars
    • 2.2: The Sky: Its Motions and Cycles
    • 2.3: Sun and Planets
    • 2.4: Astronomical Influences on Earth's Climate
    • 2: Review Questions (27)
    • 2: Problems (12)
    • 2: Optimized Problems (4)
    • 2: Learning to Look (3)
    • 2: General Problems (6)
    • 2: Review Exercises
    • 2: Ranking Task Exercises (2)
    • 2: Animation Tutorial (1)
    • 2: Waypoint
    • 2: Tutorial (2)
    • 2: Extra Problems (25)

  • Chapter 3: Moon Phases and Eclipses
    • 3.1: The Changeable Moon (1)
    • 3.2: Lunar Eclipses
    • 3.3: Solar Eclipses
    • 3.4: Predicting Eclipses
    • 3: Review Questions (18)
    • 3: Problems (16)
    • 3: Optimized Problems (6)
    • 3: Learning to Look (11)
    • 3: General Problems (4)
    • 3: Review Exercises
    • 3: Ranking Task Exercises (2)
    • 3: Animation Tutorial (4)
    • 3: Waypoint
    • 3: Tutorial (2)
    • 3: Extra Problems (23)

  • Chapter 4: The Origin of Modern Astronomy
    • 4.1: Archaeoastronomy
    • 4.2: Classical Astronomy
    • 4.3: The Copernican Revolution
    • 4.4: Planetary Motion
    • 4.5: Galileo Galilei
    • 4.6: Ninety-Nine Years That Revolutionized Astronomy
    • 4: Review Questions (25)
    • 4: Problems (11)
    • 4: Optimized Problems (6)
    • 4: Learning to Look (4)
    • 4: General Problems (5)
    • 4: Review Exercises
    • 4: Ranking Task Exercises (2)
    • 4: Animation Tutorial (1)
    • 4: Waypoint
    • 4: Tutorial (2)
    • 4: Extra Problems (26)

  • Chapter 5: Gravity
    • 5.1: Galileo's and Newton's Two New Sciences
    • 5.2: Orbital Motion and Tides
    • 5.3: Einstein and Relativity
    • 5: Review Questions (36)
    • 5: Problems (14)
    • 5: Optimized Problems (4)
    • 5: Learning to Look (1)
    • 5: General Problems (5)
    • 5: Review Exercises
    • 5: Ranking Task Exercises (2)
    • 5: Animation Tutorial (3)
    • 5: Waypoint
    • 5: Tutorial (2)
    • 5: Extra Problems (25)

  • Chapter 6: Light and Telescopes
    • 6.1: Radiation: Information From Space
    • 6.2: Telescopes
    • 6.3: Observatories on Earth: Optical and Radio
    • 6.4: Airborne and Space Observatories
    • 6.5: Astronomical Instruments and Techniques
    • 6.6: Non-Electromagnetic Astronomy
    • 6: Review Questions (18)
    • 6: Problems (11)
    • 6: Optimized Problems (6)
    • 6: Learning to Look (8)
    • 6: General Problems (5)
    • 6: Review Exercises
    • 6: Ranking Task Exercises (2)
    • 6: Animation Tutorial (1)
    • 6: Waypoint
    • 6: Tutorial (2)
    • 6: Extra Problems (26)

  • Chapter 7: Atoms and Spectra
    • 7.1: Atoms
    • 7.2: Interactions of Light and Matter
    • 7.3: Understanding Spectra
    • 7: Review Questions (21)
    • 7: Problems (11)
    • 7: Optimized Problems (6)
    • 7: Learning to Look (7)
    • 7: General Problems (4)
    • 7: Review Exercises
    • 7: Ranking Task Exercises (2)
    • 7: Animation Tutorial (2)
    • 7: Waypoint
    • 7: Tutorial (2)
    • 7: Extra Problems (26)

  • Chapter 8: The Sun
    • 8.1: The Solar Atmosphere
    • 8.2: Solar Activity
    • 8.3: Nuclear Fusion in the Sun
    • 8: Review Questions (29)
    • 8: Problems (15)
    • 8: Optimized Problems (7)
    • 8: Learning to Look (6)
    • 8: General Problems (3)
    • 8: Review Exercises
    • 8: Ranking Task Exercises (2)
    • 8: Animation Tutorial (3)
    • 8: Waypoint
    • 8: Tutorial (2)
    • 8: Extra Problems (27)

  • Chapter 9: Origin of Stars, Galaxies, and the Universe
    • 9.1: The Sun Among the Stars
    • 9.2: The Birth of Stars
    • 9.3: The Deaths of Stars
    • 9.4: Our Home Galaxy
    • 9.5: The Universe of Galaxies
    • 9.6: The Origin of the Universe
    • 9.7: The Story of Matter
    • 9: Review Questions (13)
    • 9: Problems (12)
    • 9: Optimized Problems
    • 9: Learning to Look (4)
    • 9: General Problems
    • 9: Review Exercises
    • 9: Ranking Task Exercises (4)
    • 9: Animation Tutorial
    • 9: Waypoint
    • 9: Tutorial
    • 9: Extra Problems

  • Chapter 10: The Solar System: A Family Portrait and History
    • 10.1: The Great Chain of Origins
    • 10.2: A Solar System Family Portrait
    • 10.3: A Recipe for Planets
    • 10: Review Questions (15)
    • 10: Problems (8)
    • 10: Optimized Problems (5)
    • 10: Learning to Look (3)
    • 10: General Problems (3)
    • 10: Review Exercises
    • 10: Ranking Task Exercises (2)
    • 10: Animation Tutorial (1)
    • 10: Waypoint
    • 10: Tutorial (2)
    • 10: Extra Problems (20)

  • Chapter 11: Earth: The Active Planet
    • 11.1: A Travel Guide to the Terrestrial Planets
    • 11.2: Earth: Inside and Outside
    • 11.3: Earth’s Unique Outer Layers
    • 11: Review Questions (33)
    • 11: Problems (9)
    • 11: Optimized Problems (6)
    • 11: Learning to Look (6)
    • 11: General Problems (4)
    • 11: Review Exercises
    • 11: Ranking Task Exercises (2)
    • 11: Animation Tutorial (2)
    • 11: Waypoint
    • 11: Tutorial (2)
    • 11: Extra Problems (23)

  • Chapter 12: The Moon and Mercury: Comparing Airless Worlds
    • 12.1: The Moon
    • 12.2: Mercury
    • 12.3: Space Age Astronomy
    • 12: Review Questions (24)
    • 12: Problems (13)
    • 12: Optimized Problems (6)
    • 12: Learning to Look (3)
    • 12: General Problems (2)
    • 12: Review Exercises
    • 12: Ranking Task Exercises (2)
    • 12: Animation Tutorial (2)
    • 12: Waypoint
    • 12: Tutorial (2)
    • 12: Extra Problems (25)

  • Chapter 13: Venus and Mars
    • 13.1: Venus
    • 13.2: Mars
    • 13: Review Questions (24)
    • 13: Problems (12)
    • 13: Optimized Problems (7)
    • 13: Learning to Look (5)
    • 13: General Problems (2)
    • 13: Review Exercises
    • 13: Ranking Task Exercises (2)
    • 13: Animation Tutorial
    • 13: Waypoint
    • 13: Tutorial (2)
    • 13: Extra Problems (25)

  • Chapter 14: Jupiter and Saturn
    • 14.1: A Travel Guide to the Outer Solar System
    • 14.2: Jupiter
    • 14.3: The Satellites of Jupiter
    • 14.4: Planetary Rings
    • 14.5: Saturn
    • 14.6: The Satellites of Saturn
    • 14: Review Questions (32)
    • 14: Problems (10)
    • 14: Optimized Problems (6)
    • 14: Learning to Look (2)
    • 14: General Problems (5)
    • 14: Review Exercises
    • 14: Ranking Task Exercises (2)
    • 14: Animation Tutorial (1)
    • 14: Waypoint
    • 14: Tutorial (2)
    • 14: Extra Problems (30)

  • Chapter 15: Uranus, Neptune, and Beyond
    • 15.1: Uranus
    • 15.2: Neptune
    • 15.3: Pluto and Beyond
    • 15: Review Questions (20)
    • 15: Problems (10)
    • 15: Optimized Problems (7)
    • 15: Learning to Look (5)
    • 15: General Problems (3)
    • 15: Review Exercises
    • 15: Ranking Task Exercises (2)
    • 15: Animation Tutorial (1)
    • 15: Waypoint
    • 15: Tutorial (2)
    • 15: Extra Problems (23)

  • Chapter 16: Asteroids, Comets, and Meteorites
    • 16.1: Asteroids
    • 16.2: Comets
    • 16.3: Meteorites, Meteors, and Meteoroids
    • 16.4: Impacts on Planets
    • 16: Review Questions (12)
    • 16: Problems (11)
    • 16: Optimized Problems (6)
    • 16: Learning to Look (3)
    • 16: General Problems (4)
    • 16: Review Exercises
    • 16: Ranking Task Exercises (2)
    • 16: Animation Tutorial (2)
    • 16: Waypoint
    • 16: Tutorial (2)
    • 16: Extra Problems (28)

  • Chapter 17: Extrasolar Planets
    • 17.1: Expecting Exoplanets
    • 17.2: Finding Exoplanets
    • 17.3: Exoplanet Properties
    • 17.4: Earth-like Exoplanets
    • 17: Review Questions (17)
    • 17: Problems (8)
    • 17: Optimized Problems (1)
    • 17: Learning to Look (2)
    • 17: General Problems (1)
    • 17: Review Exercises
    • 17: Ranking Task Exercises (2)
    • 17: Animation Tutorial
    • 17: Waypoint
    • 17: Tutorial
    • 17: Extra Problems (5)

  • Chapter 18: Astrobiology: Life on Other Worlds
    • 18.1: What Is Life?
    • 18.2: Life in the Universe
    • 18.3: Intelligent Life in the Universe
    • 18: Review Questions (29)
    • 18: Problems (9)
    • 18: Optimized Problems (7)
    • 18: Learning to Look (2)
    • 18: General Problems (3)
    • 18: Review Exercises
    • 18: Ranking Task Exercises (2)
    • 18: Animation Tutorial (2)
    • 18: Waypoint
    • 18: Tutorial (2)
    • 18: Extra Problems (29)

  • Chapter VAL: Virtual Astronomy Labs
    • Lab 1: Measurement and Unit Conversion (3)
    • Lab 2: Light and Matter (4)
    • Lab 3: The Doppler Effect (2)
    • Lab 4: The Solar Wind and Cosmic Rays (3)
    • Lab 5: Planetary Geology (3)
    • Lab 6: Tides and Tidal Forces (2)
    • Lab 7: Planetary Atmospheres (2)
    • Lab 8: Extrasolar Planets (3)
    • Lab 9: Kepler's Laws (3)
    • Lab 10: Helioseismology (2)
    • Lab 11: Stars, Star Clusters, and the HR Diagram (2)
    • Lab 12: Binary Stars (3)
    • Lab 13: Stellar Explosions, Novae, and Supernovae (3)
    • Lab 14: Neutron Stars and Pulsars (3)
    • Lab 15: Asteroids and Kuiper Belt Objects (3)
    • Lab 16: Astronomical Distance Scales (3)
    • Lab 17: Evidence for Dark Matter (2)
    • Lab 18: The Hubble Law (3)
    • Lab 19: The Fate of the Universe (1)
    • Lab 20: Stellarium Labs (10)


The Solar System, 15e, by Michael Seeds, Dana Backman, and Eric Wegryn, derived from the comprehensive Foundations of Astronomy, delivers a streamlined yet robust overview of celestial mechanics, the nature of light and telescopes, and the fundamental principles that govern our universe—before concentrating deeply on planetary science. This text is ideal for instructors who want to explore the planets, moons, small bodies, and the origin and structure of the solar system in rich detail, while still providing essential context on the sky, the Sun, and the broader cosmos. The final chapters offer an engaging transition into the discovery of extrasolar planets and the search for life beyond Earth, making this an excellent choice for non-majors courses focused on planetary astronomy or astrobiology. Available with WebAssign, which features auto-graded problem sets, conceptually driven activities, and access to Virtual Astronomy Labs—interactive simulations that give students hands-on experience with key astronomical concepts, all designed to reinforce learning and increase engagement.

  • NEW! Chapter 17 is a new chapter focused exclusively on the rapidly expanding field of extrasolar planets, consolidating substantial up-to-date content with some material appearing in other chapters in the previous edition.
  • NEW! Every chapter has been reviewed, revised and updated with recent discoveries and images, including the latest results from the James Webb Space Telescope and new international planetary missions. This includes the chapter-opening images.
  • NEW! Revised and enhanced inclusive language, including using “we” terminology over “you.” The wording has also been updated to avoid excluding persons with low visual acuity.
  • Practicing Science boxes at the end of many text sections are carefully designed to help students review and synthesize concepts from the section and practice thinking like a scientist.
  • Special two-page Concept Art spreads provide an opportunity for students to synthesize their own understanding and share in the satisfaction that scientists feel as they uncover the secrets of nature.
  • Celestial Profiles of objects in our Solar System directly compare and contrast planets with each other. This is the way planetary scientists understand the planets: not as isolated, unrelated bodies but as siblings with noticeable differences and yet many characteristics and a family history in common.
  • Guideposts on the opening page of each chapter help students understand the organization of the book by focusing on a small number of questions to be answered as they read the chapter.
  • End-of-Chapter Review Questions are designed to help students review and test their understanding of the material.
  • Virtual Astronomy Laboratories (VAL) can be assigned as a standalone activity or as part of a larger learning experience. VAL incorporates real astronomical data, simulations, and other interactive elements, offering students the opportunity to experience astronomy as a scientist. Targeted feedback guides students in revising any incorrect answers.
    • New Stellarium Activities: Included in our Virtual Astronomy Labs are 10 new Stellarium Activities that engage students in exploring the night sky through realistic, interactive online learning. These immersive activities cover constellations, planets, stellar properties, and more, using diverse assessments to enhance critical thinking and expand celestial knowledge.

Questions Available within WebAssign

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Group Quantity Questions
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Chapter 1: Here and Now
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Chapter 2: A Guide to the Sky
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Chapter 3: Moon Phases and Eclipses
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Chapter 4: The Origin of Modern Astronomy
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Chapter 5: Gravity
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Chapter 6: Light and Telescopes
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Chapter 7: Atoms and Spectra
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Chapter 8: The Sun
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Chapter 9: Origin of Stars, Galaxies, and the Universe
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Chapter 10: The Solar System: A Family Portrait and History
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Chapter 11: Earth: The Active Planet
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Chapter 12: The Moon and Mercury: Comparing Airless Worlds
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Chapter 13: Venus and Mars
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Chapter 14: Jupiter and Saturn
14.AT 1 002
14.CRQ 32 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 020 021 022 024 025 026 027 028 029 030 032 033 034 035
14.CVQ 2 001 002
14.LL 2 001 002
14.MS 5 001 002 003 004 005
14.OP 6 002 005 012 013 014 015
14.RTE 2 001 002
14.TP 10 001 002 003 004 005 006 007 009 010 011
14.Tut 2 001 002
14.XP 30 CRQ.001 CRQ.002 CRQ.003 CRQ.004 CRQ.005 RE.001 RE.002 RE.003 RE.004 RE.005 RE.006 RE.007 RE.008 RE.009 RE.010 RE.011 RE.012 RE.013 RE.014 RE.015 RE.016 RE.017 RE.018 RE.019 RE.020 RE.021 RE.022 RE.023 RTE.001 RTE.002
Chapter 15: Uranus, Neptune, and Beyond
15.AT 1 001
15.CRQ 20 001 002 003 005 006 007 008 009 010 012 013 014 015 016 017 018 019 023 024 025
15.CVQ 1 001
15.DWB 3 001 002 003
15.LL 5 001 002 003 004 005
15.MS 3 001 002 003
15.OP 7 003 004 026 027 028 029 030
15.RTE 2 001 002
15.TP 10 001 002 003 004 005 007 008 009 010 011
15.Tut 2 001 002
15.XP 23 CRQ.001 CRQ.002 CRQ.003 RE.001 RE.002 RE.003 RE.005 RE.006 RE.007 RE.008 RE.010 RE.011 RE.012 RE.013 RE.014 RE.015 RE.016 RE.017 RE.018 RE.019 RE.020 RTE.001 RTE.002
Chapter 16: Asteroids, Comets, and Meteorites
16.AT 2 001 002
16.CRQ 12 001 002 003 004 007 008 009 010 011 012 013 014
16.CVQ 2 001 002
16.DWB 1 002
16.LL 3 001 002 003
16.MS 4 001 002 003 004
16.OP 6 001 005 007 010 012 017
16.RTE 2 001 002
16.TP 11 001 002 003 004 005 006 007 008 009 010 011
16.Tut 2 001 002
16.XP 28 CRQ.001 CRQ.002 CRQ.003 CRQ.004 RE.001 RE.002 RE.004 RE.005 RE.006 RE.007 RE.008 RE.009 RE.011 RE.012 RE.014 RE.015 RE.016 RE.017 RE.018 RE.019 RE.020 RE.021 RE.022 RE.023 RE.024 RE.025 RTE.001 RTE.002
Chapter 17: Extrasolar Planets
17.CRQ 17 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017
17.DWB 2 001 002
17.LL 2 001 002
17.MS 1 004
17.OP 1 002
17.RTE 2 001 002
17.TP 8 001 002 003 004 005 006 007 008
17.XP 5 CRQ.001 RE.001 RE.002 RE.003 RE.004
Chapter 18: Astrobiology: Life on Other Worlds
18.AT 2 001 002
18.CRQ 29 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029
18.CVQ 1 001
18.LL 2 001 002
18.MS 3 001 002 003
18.OP 7 003 011 012 013 014 015 016
18.RTE 2 001 002
18.TP 9 001 002 003 004 006 007 008 009 010
18.Tut 2 001 002
18.XP 29 CRQ.001 CRQ.002 RE.001 RE.002 RE.003 RE.004 RE.005 RE.006 RE.007 RE.008 RE.009 RE.010 RE.011 RE.012 RE.013 RE.014 RE.015 RE.016 RE.017 RE.018 RE.019 RE.020 RE.021 RE.022 RE.023 RE.024 RE.025 RTE.001 RTE.002
Total 1452  

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