12. Quasars and Active Galactic Nuclei

Chapters in this book

1. Frontmatter i
2. CONTENTS vii
3. PREFACE ix
4. 1. Exploring the Universe in the Infrared 1
5. 2. The Sky as Seen by Spitzer 13
6. 3. The Birth of Stars and Planetary Systems 28
7. 4. Planetary Debris Disks–Windows on Exoplanetary Systems 45
8. 5. A Torrent of Exoplanets 62
9. 6. Probing the Solar System in the Infrared 79
10. 7. Comets Are Not Forever 91
11. 8. The Milky Way and Interstellar Matter: Stars and the Space Between 100
12. 9. Just Beyond the Milky Way 115
13. 10. Meet the Milky Way’s Neighbors 128
14. 11. Polling the Universe 141
15. 12. Quasars and Active Galactic Nuclei 153
16. 13. Galaxy Clusters: The Nodes in the Cosmic Web 164
17. 14. The Light of Other Days 177
18. 15. The Dim Boundary 192
19. 16. Returning Home 204
20. Appendix A. A Short History of the Spitzer Space Telescope 211
21. Appendix B. How Spitzer Works and How Spitzer Is Used 219
22. Acknowledgments 229
23. NOTES 233
24. Further Reading 257
25. Credits/Permissions 261
26. Credits for Epigraphs 268
27. INDEX 269