Horizons Exploring the Universe 14th edition

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: Apply It
  • 1: Learn It
  
  
• Chapter 2: A User's Guide to the Sky
  • 2.1: The Stars
  • 2.2: The Sky and Its Motions
  • 2: Apply It
  • 2: Learn It
  
  
• Chapter 3: Cycles of the Sun and Moon
  • 3.1: Cycles of the Sun
  • 3.2: Astronomical Influences on Earth's Climate
  • 3.3: The Changeable Moon
  • 3: Apply It
  • 3: Learn It
  
  
• Chapter 4: The Origin of Modern Astronomy
  • 4.1: Classical Astronomy
  • 4.2: The Copernican Revolution
  • 4.3: Planetary Motion
  • 4.4: Galileo Galilei
  • 4.5: Isaac Newton and Orbital Motion
  • 4: Apply It
  • 4: Learn It
  
  
• Chapter 5: Light and Telescopes
  • 5.1: Radiation: Information From Space
  • 5.2: Telescopes
  • 5.3: Observatories on Earth: Optical and Radio
  • 5.4: Airborne and Space Observatories
  • 5.5: Astronomical Instruments and Techniques
  • 5: Apply It
  • 5: Learn It
  
  
• Chapter 6: Atoms and Spectra
  • 6.1: Atoms
  • 6.2: Interactions of Light and Matter
  • 6.3: Understanding Spectra
  • 6: Apply It
  • 6: Learn It
  
  
• Chapter 7: The Sun
  • 7.1: The Solar Atmosphere
  • 7.2: Solar Activity
  • 7.3: Nuclear Fusion in the Sun
  • 7: Apply It
  • 7: Learn It
  
  
• Chapter 8: The Family of Stars
  • 8.1: Star Distances
  • 8.2: Apparent Brightness, Intrinsic Brightness, and Luminosity
  • 8.3: Stellar Spectra
  • 8.4: Star Sizes
  • 8.5: Star Masses—Binary Stars
  • 8.6: A Census of the Stars
  • 8: Apply It
  • 8: Learn It
  
  
• Chapter 9: The Formation and Structure of Stars
  • 9.1: The Interstellar Medium
  • 9.2: Making Stars from the Interstellar Medium
  • 9.3: Young Stellar Objects and Protostellar Disks
  • 9.4: Stellar Structure and Nuclear Fusion
  • 9.5: Main-Sequence Stars
  • 9: Apply It
  • 9: Learn It
  
  
• Chapter 10: The Deaths of Stars
  • 10.1: Giant Stars
  • 10.2: Lower-Main-Sequence Stars
  • 10.3: The Evolution of Binary Systems
  • 10.4: The Deaths of Massive Stars
  • 10: Apply It
  • 10: Learn It
  
  
• Chapter 11: Neutron Stars and Black Holes
  • 11.1: Neutron Stars
  • 11.2: Black Holes
  • 11.3: Compact Objects With Disks and Jets
  • 11: Apply It
  • 11: Learn It
  
  
• Chapter 12: The Milky Way Galaxy
  • 12.1: Discovery of the Galaxy
  • 12.2: Structure of the Galaxy
  • 12.3: Spiral Arms and Star Formation
  • 12.4: The Nucleus of the Galaxy
  • 12.5: Origin and History of the Milky Way Galaxy
  • 12: Apply It
  • 12: Learn It
  
  
• Chapter 13: Galaxies: Normal and Active
  • 13.1: The Family of Galaxies
  • 13.2: Measuring the Properties of Galaxies
  • 13.3: The Evolution of Galaxies
  • 13.4: Active Galactic Nuclei and Quasars
  • 13.5: Disks, Jets, Eruptions, and Galaxy Evolution
  • 13: Apply It
  • 13: Learn It
  
  
• Chapter 14: Modern Cosmology
  • 14.1: Introduction to the Universe
  • 14.2: The Big Bang Theory
  • 14.3: Space and Time, Matter and Gravity
  • 14.4: Twenty-First-Century Cosmology
  • 14: Apply It
  • 14: Learn It
  
  
• Chapter 15: Origin of the Solar System and Extrasolar Planets
  • 15.1: The Great Chain of Origins
  • 15.2: A Survey of the Solar System
  • 15.3: The Story of Planet Building
  • 15.4: Planets Orbiting Other Stars
  • 15: Apply It
  • 15: Learn It
  
  
• Chapter 16: Earth and Moon: Bases for Comparative Planetology
  • 16.1: A Travel Guide to the Terrestrial Planets
  • 16.2: Planet Earth
  • 16.3: The Moon
  • 16: Apply It
  • 16: Learn It
  
  
• Chapter 17: Mercury, Venus, and Mars
  • 17.1: Mercury
  • 17.2: Venus
  • 17.3: Mars
  • 17: Apply It
  • 17: Learn It
  
  
• Chapter 18: The Outer Solar System
  • 18.1: A Travel Guide to the Outer Solar System
  • 18.2: Jupiter
  • 18.3: Saturn
  • 18.4: Uranus
  • 18.5: Neptune
  • 18.6: Pluto and the Kuiper Belt
  • 18: Apply It
  • 18: Learn It
  
  
• Chapter 19: Meteorites, Asteroids, and Comets
  • 19.1: Meteoroids, Meteors, and Meteorites
  • 19.2: Asteroids
  • 19.3: Comets
  • 19.4: Asteroid and Comet Impacts
  • 19: Apply It
  • 19: Learn It
  
  
• Chapter 20: Astrobiology: Life on Other Worlds
  • 20.1: The Nature of Life
  • 20.2: Life in the Universe
  • 20.3: Intelligent Life in the Universe
  • 20: Apply It
  • 20: Learn It
  
  
• Chapter VAL: Virtual Astronomy Labs
  • Lab 1: Measurement and Unit Conversion
  • Lab 2: Light and Matter
  • Lab 3: The Doppler Effect
  • Lab 4: The Solar Wind and Cosmic Rays
  • Lab 5: Planetary Geology
  • Lab 6: Tides and Tidal Forces
  • Lab 7: Planetary Atmospheres
  • Lab 8: Extrasolar Planets
  • Lab 9: Kepler's Laws
  • Lab 10: Helioseismology
  • Lab 11: Stars, Star Clusters, and the HR Diagram
  • Lab 12: Binary Stars
  • Lab 13: Stellar Explosions, Novae, and Supernovae
  • Lab 14: Neutron Stars and Pulsars
  • Lab 15: Asteroids and Kuiper Belt Objects
  • Lab 16: Astronomical Distance Scales
  • Lab 17: Evidence for Dark Matter
  • Lab 18: The Hubble Law
  • Lab 19: The Fate of the Universe
  • Lab 20: Stellarium Labs