Part I. The cosmic landscape -- 1. Our planetary neighborhood -- 2. Beyond the solar system -- 3. Astronomical numbers -- 4. Foundations of astronomy -- 5. The night sky -- 6. The year -- 7. The time of day -- 8. Lunar cycles -- 9. Calendars -- 10. Geometry of the Earth, moon, and sun -- 11. Planets: the wandering stars -- 12. The beginnings of modern astronomy -- 13. Observing the sky -- Part II. Probing matter, light, and their interactions -- 14. Astronomical motion: inertia, mass, and force -- 15. Force, acceleration, and interaction -- 16. The universal law of gravity -- 17. Measuring a body's mass using orbital motion -- 18. Orbital and escape velocities -- 19. Tides -- 20. Conservation laws -- 21. The dual nature of light and matter -- 22. The electromagnetic spectrum -- 23. Thermal radiation -- 24. Identifying atoms by their spectra -- 25. The Doppler shift -- 26. Special relativity -- 27. General relativity -- 28. Detecting light -- 29. Collecting light -- 30. Focusing light -- 31. Telescope resolution -- 32. The Earth's atmosphere and space observatories -- 33. Amateur astronomy -- Part III. The solar system -- 34. The structure of the solar system -- 35. The origin of the solar system -- 36. Other planetary systems -- 37. The Earth as a terrestrial planet -- 38. Earth's atmosphere and hydrosphere -- 39. Our moon -- 40. Mercury -- 41. Venus -- 42. Mars -- 43. Asteroids -- 44. Comparative planetology -- 45. Jupiter and Saturn -- 46. Uranus and Neptune -- 47. Satellite systems and rings -- 48. Ice worlds, Pluto, and beyond -- 49. Comets -- 50. Impacts on Earth -- Part IV. Star and stellar evolution -- 51. The sun, our star -- 52. The sun's source of power -- 53. Solar activity -- 54. Surveying the stars -- 55. The luminosities of stars -- 56. The temperatures and compositions of stars -- 57. The masses of orbiting stars -- 58. The sizes of stars -- 59. The H-R diagram -- 60. Overview of stellar evolution -- 61. Star formation -- 62. Main-sequence stars -- 63. Giant stars -- 64. Variable stars -- 65. Mass loss and death of low-mass stars -- 66. Exploding white dwarfs -- 67. Old age and death of massive stars -- 68. Neutron stars -- 69. Black holes -- 70. Star clusters -- Part V. Galaxies and the universe -- 71. Discovering the Milky Way -- 72. Stars of the Milky Way -- 73. Gas and dust in the Milky Way -- 74. Mass and motions in the Milky Way -- 75. A universe of galaxies -- 76. Types of galaxies -- 77. Galaxy clustering -- 78. Active galactic nuclei -- 79. Dark matter -- 80. Cosmology -- 81. The edges of the universe -- 82. The curvature of the universe -- 83. The beginnings of the universe -- 84. Dark energy and the fate of the universe -- 85. Astrobiology -- 86. The search for life elsewhere.