The following animations and videos are intended to enhance your understanding of the astronomy concepts presented in Universe. In the book, media icons link the relevant topics and figures with the corresponding animations and videos presented in this web site.

PART I Introducing Astronomy - Chapter: 1 | 2 | 3 | 4 | 5 | 6 |

PART II Planets and Moons - Chapter: 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |

PART III Stars and Stellar Evolution - Chapter: 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |

PART IV Galaxies and Cosmology - Chapter: 26 | 27 | 28 | 29 | 30 |

PART I Introducing Astronomy

Chapter 1: Astronomy and the Universe

• Astronomical Distances - The Light-Year - (Animation 1-1)

Chapter 2: Knowing the Heavens

• The Celestial Sphere - (Animation 2-1)
• The Seasons - (Animation 2-2)

Chapter 3: Eclipses and the Motion of the Moon

• The Moon's Phases - (Animation 3-1)
• The Moon's Rotation - (Animation 3-2)
• The Sidereal and Synodic Months - (Animation 3-3)
• A Solar Eclipse Viewed from the Moon - (Animation 3-4)

Chapter 4: Gravitation and the Waltz of the Planets

• The Greek Geocentric Model of the Universe - (Animation 4-1)
• Path of Mars - (Animation 4-2)
• A Geocentric Explanation of Retrograde Motion - (Animation 4-3)
• A Heliocentric Explanation of Planetary Motion - (Animation 4-4)
• Synodic and Sidereal Periods - (Animation 4-5)
• Kepler's First and Second Laws - (Animation 4-6)
• The Origin of Tidal Forces - (Animation 4-7)

Chapter 5: The Nature of Light

• Continuous Spectra, Absorption Line Spectra, and Emission Line Spectra - (Animation 5-1)
• Absorption and Emission of a Photon - (Animation 5-2)

Chapter 6: Optics and Telescopes

• Refracting Telescope - (Animation 6-1)
• Reflecting Telescope - (Animation 6-2)
• The Arecibo Radio Telescope - (Video 6-1)

PART II Planets and Moons

Chapter 7: Our Solar System

• Planetary Orbits - (Animation 7-1)
• Protoplanetary Disks in the Orion Nebula - (Video 7-1)
• The Birth of the Solar System - (Animation 7-2)

Chapter 8: Our Living Earth

• An Oasis in the Solar System - (Video 8-1)
• Greenhouse Effect - (Animation 8-1)
• Seismic Waves - (Animation 8-2)
• Plate Tectonics and Earthquakes - (Animation 8-3)
• Collision of Two Plates: San Andreas Fault - (Animation 8-4)
• Collision of Two Plates: South America - (Animation 8-5)
• The Separation of Two Plates - (Animation 8-6)
• Collision of Two Plates: The Himalayas - (Animation 8-7)
• Collision of Two Plates: Volcanic Islands - (Animation 8-8)
• Cloud Patterns around the Earth - (Animation 8-9)
• The Aurora Borealis - (Video 8-2)

Chapter 9: Our Barren Moon

• The Far Side of the Moon - (Video 9-1)
• Ranger 9 Strikes the Moon - (Video 9-2)
• An Apollo Astronaut on the Moon - (Video 9-3)
• Gathering Moon Rocks - (Video 9-4)
• The Libration of the Moon - (Animation 9-1)
• The Formation of the Moon - (Animation 9-2)

Chapter 10: Sun-Scorched Mercury

• Elongations of Mercury - (Animation 10-1)
• A Solar Transit of Mercury - (Video 10-1)
• Spin-Orbit Coupling - (Animation 10-2)
• Mercury's Cratered Surface - (Video 10-2)
• Formation of a Scarp - (Animation 10-3)
• Mercury's Magnetic Field - (Animation 10-4)

Chapter 11: Cloud-Covered Venus

• Prograde and Retrograde Rotation - (Animation 11-1)
• Magellan Maps a Planet - (Animation 11-2)
• Volcanoes on Venus - (Video 11-1)
• An Immense Chasm on Venus - (Video 11-2)
• Craters, Volcanoes, and Highlands on Venus - (Video 11-3)
• Impact Craters and Volcanoes on Venus - (Video 11-4)

Chapter 12: Red Planet Mars

• The Orbits of the Earth and Mars - (Animation 12-1)
• Simulation of Mars Global Surveyor during Mapping - (Animation 12-2)
• The Topography of Mars - (Animation 12-3)
• Valles Marineris and the Giant Volcanoes of Mars - (Video 12-1)
• A Martian Chasm - (Video 12-2)
• Surface of Mars as Seen by the Viking 1 Lander - (Video 12-3)

Chapter 13: Jupiter: Lord of the Planets

• Jupiter from Voyager 1 - (Video 13-1)
• The Great Red Spot - (Video 13-2)
• The Rotation of the Great Red Spot - (Video 13-3)
• Motions in Jupiter's Atmosphere - (Video 13-4)

Chapter 14: The Galilean Satellites of Jupiter

• Jupiter's Moon Io - (Video 14-1)
• A Simulated Flight Over Io - (Video 14-2)
• The Io Torus - (Video 14-3)
• Jupiter's Moon Ganymede - (Video 14-4)
• The Orbits of the Galilean Satellites - (Animation 14-1)

Chapter 15: The Spectacular Saturnian System

• Saturn From Voyager 2 - (Video 15-1)
• The Structure of Saturn's Rings - (Video 15-2)
• Saturn From the Hubble Space Telescope - (Video 15-3)
• Saturn's Moon Enceladus - (Video 15-4)

Chapter 16: The Outer Worlds

• Exaggerated Seasons on Uranus - (Animation 16-1)
• How the Rings of Uranus Were Discovered - (Animation 16-2)
• Neptune From Voyager 2 - (Video 16-1)
• Neptune's Rings - (Video 16-2)
• Uranus' Moon Miranda - (Video 16-3)
• Neptune's Moon Triton - (Video 16-4)
• A Simulated Flight Over Triton - (Video 16-5)
• Pluto and Its Moon - (Video 16-6)
• Pluto and Charon - (Video 16-7)

Chapter 17: Vagabonds of the Solar System

• Orbit and Tail of a Comet
• 100 Years of Comet Halley - (Animation 17-1)
• Gaspra from the Galileo Spacecraft - (Video 17-1)
• Two Comets and an Active Sun - (Video 17-2)

PART III Stars and Stellar Evolution

Chapter 18: Our Star, the Sun

• Steps to Fuse Hydrogen into Helium - (Animation 18-1)
• Granules on the Sun's Surface - (Video 18-1)
• Convection in the Photosphere - (Video 18-2)
• Seething Granules Around Sunspots - (Video 18-3)
• The Motion of a Small Sunspot Group - (Video 18-4)
• An X-Ray Look at the Sun - (Video 18-5)
• Seismic Quakes on the Sun - (Video 18-6)

Chapter 19: The Nature of the Stars

• Stellar Parallax - (Animation 19-1)
• The Inverse-Square Law
• Star Orbits in a Binary System - (Animation 19-2)
• Radial Velocity Curves - (Animation 19-3)

Chapter 20: The Birth of Stars

• Orion Nebula - (Animation 20-1)
• Massive Young Stars in the Milky Way - (Animation 20-2)
• A Stellar Jet in the Trifid Nebula - (Animation 20-3)
• Embryonic Stars in the Eagle Nebula - (Animation 20-4)
• A Supernova Remnant - (Animation 20-5)

Chapter 21: Stellar Evolution: After the Main Sequence

• The Hertzsprung-Russell Diagram and Stellar Evolution - (Animation 21-1)
• A Pulsating Red Giant - (Animation 21-2)

Chapter 22: Stellar Evolution: The Deaths of Stars

• The Post-Main-Sequence Evolution of a 1-solar-mass Star - (Animation 22-1)
• Convection Inside a Giant Star - (Animation 22-2)
• In the Heart of a Type II Supernova - (Animation 22-3)
• A Type Ia Supernova - (Animation 22-4)

Chapter 23: Neutron Stars

• The Dynamic Heart of the Crab Nebula - (Video 23-2)

Chapter 24: Black Holes

• The Equivalence Principle - (Animation 24-1)
• A New Type of Black Hole in M82? - (Video 24-1)

PART IV Galaxies and Cosmology

Chapter 25: Our Galaxy

• Fast-Moving Stars at the Galactic Center - (Video 25-1)

Chapter 26: Galaxies

• An Island Universe - (Video 26-1)
• The Merger of Two Disk Galaxies - (Animation 26-1)
• Galactic Cannibalism - (Animation 26-2)
• When Galaxies Interact - (Animation 26-3)
• Radiation from a Rotating Galaxy - (Animation 26-4)

Chapter 27: Quasars, Active Galaxies, and Gamma-Ray Bursters

• Superluminal Motion - (Video 27-1)
• The Central Engine of an Active Galaxy - (Animation 27-1)
• A Supermassive Black Hole in an Active Galaxy - (Animation 27-2)
• Zooming into an Active Galaxy - (Animation 27-3)

Chapter 28: Cosmology: The Creation and Fate of the Universe

• The Expanding Universe and the Hubble Law - (Animation 28-1)

Chapter 29: Exploring the Early Universe

Chapter 30: The Search for Extraterrestrial Life