Free Astronomy Books

This is the updated list of astronomy books available for free download or online reading. These books and papers cover all the areas of astrophysics, cosmology, galactic and extragalactic astronomy, solar and stellar physics, celestial mechanics, planetary science, astrobiology, as well as some popular works. The books are made available free of charge to the reader by their authors or publishers. Here is a categorized directory of astronomy books. This page is updated daily.

1. Astronomy for Amateurs
   Camille Flammarion | D. Appleton and Company, Published in 1910
2. Advances in Global and Local Helioseismology: an Introductory Review
   Alexander G. Kosovichev | arXiv, Published in 2011, 86 pages
3. The Birth and Death of Stars
   James Schombert | University of Oregon, Published in 2008
4. The Telescope
   Louis Bell | McGraw-Hill, Published in 1922, 294 pages
5. Solar System
   | Wikipedia, Published in 2012, 646 pages
6. Introduction to Cosmology
   David H Lyth | arXiv, Published in 1993, 53 pages
7. General Astronomy
   Harold Spencer Jones | Edward Arnold and Company, Published in 1924, 392 pages
8. Practical Astronomy for Engineers
   Frederick Hanley Seares | Stephens, Published in 1909, 160 pages
9. To See the Unseen: A History of Planetary Radar Astronomy
   Andrew J. Butrica | NASA History Division, Published in 1996, 301 pages
10. The Practical Astronomer
    Thomas Dick | Seeley, Burnside, and Seeley, Published in 1845, 588 pages
11. The Solar Magnetic Field
    Sami Solanki, Bernd Inhester, Manfred Schussler | arXiv, Published in 2010, 83 pages
12. Voyager 1 and 2: Atlas of Six Saturnian Satellites
    Raymond M. Batson | NASA, Published in 1984, 175 pages
13. Frequently Asked Questions about Calendars
    Claus Tøndering | , Published in 2008, 65 pages
14. Gamma-Ray Bursts: Progress, Problems and Prospects
    Bing Zhang, Peter Meszaros | arXiv, Published in 2008, 87 pages
15. Astrochemistry: The Issue of Molecular Complexity in Astrophysical Environments
    M. De Becker | arXiv, Published in 2013, 62 pages
16. Primordial Magnetogenesis
    Alejandra Kandus, Kerstin E. Kunze, Christos G. Tsagas | arXiv, Published in 2011, 107 pages
17. Cosmology
    James Schombert | University of Oregon, Published in 2008
18. Cluster Lenses
    Jean-Paul Kneib, Priyamvada Natarajan | arXiv, Published in 2012, 120 pages
19. Observations of the High Redshift Universe
    Richard S. Ellis | arXiv, Published in 2007, 115 pages
20. Inflationary Cosmology and Structure Formation
    J. A. Peacock | arXiv, Published in 1996, 77 pages
21. Protostars and Planets
    | Rice University, Published in 2015, 422 pages
22. The Cosmological Constant
    Sean M. Carroll | arXiv, Published in 2000, 50 pages
23. Atlas of Peculiar Galaxies
    Halton C. Arp | California Institute of Technology, Published in 1966, 190 pages
24. Telescopic Work for Starlight Evenings
    William F. Denning | Taylor and Francis, Published in 1891, 372 pages
25. Quantization in Astrophysics, Brownian Motion, and Supersymmetry
    F. Smarandache, V. Christianto | MathTiger, Published in 2007, 516 pages
26. Planetary Rings
    Matthew S. Tiscareno | arXiv, Published in 2011, 82 pages
27. From Cosmic Birth to Living Earths: The Future of UVOIR Space Astronomy
    Julianne Dalcanton, et al. | arXiv, Published in 2015, 176 pages
28. The Cosmic Web: Geometric Analysis
    Rien van de Weygaert, Willem Schaap | arXiv, Published in 2007, 129 pages
29. Elementary Astronomy
    James N. Pierce | , Published in 2013, 134 pages
30. Supernova Cosmology: Legacy and Future
    Ariel Goobar, Bruno Leibundgut | arXiv, Published in 2011, 62 pages
31. A New Astronomy
    David Peck Todd | American Book Company, Published in 1906, 437 pages
32. The Formation and Evolution of the Solar System
    James Schombert | University of Oregon, Published in 2007
33. Inflation and String Theory
    Daniel Baumann, Liam McAllister | arXiv, Published in 2014, 349 pages
34. Solar Neutrinos
    V. Antonelli, L. Miramonti, C. Pena-Garay, A. Serenelli | arXiv, Published in 2012, 51 pages
35. The Foundations of Celestial Mechanics
    George W. Collins, II | Pachart Pub House, Published in 2004, 145 pages
36. Astronomy
    Andrew Fraknoi, David Morrison, Sidney C. Wolff | Unglue.it, Published in 2016, 1200 pages
37. The Star Splitters: The High Energy Astronomy Observatories
    Wallace H. Tucker | NASA History Office, Published in 1984, 182 pages
38. An Introduction to Celestial Mechanics
    Forest Ray Moulton | The MacMillan Company, Published in 1914, 437 pages
39. The Elements of Theoretical and Descriptive Astronomy
    Charles J. White | J. Wiley, Published in 1909, 322 pages
40. Dense Matter in Compact Stars
    Andreas Schmitt | arXiv, Published in 2010, 146 pages
41. Celestial Navigation, Elementary Astronomy, Piloting
    Arturo Chiesa, Raffaele Chiesa | Sky and Sea Software, Published in 2010
42. Dark Energy: Observational Evidence and Theoretical Models
    B. Novosyadlyj, V. Pelykh, Yu. Shtanov, A. Zhuk | Akademperiodyka, Published in 2013, 380 pages
43. Lunar Stratigraphy and Sedimentology
    John Lindsay | Elsevier, Published in 1976, 311 pages
44. The Complete Idiot's Guide to The Sun
    Jay M. Pasachoff | Alpha, Published in 2003, 350 pages
45. Practical Astronomy
    P. S. Michie, F. S. Harlow | John Wiley & Sons, Published in 1893, 246 pages
46. Introduction to Millimeter/Sub-Millimeter Astronomy
    T. L. Wilson | arXiv, Published in 2009, 106 pages
47. Introduction to Cosmology
    A. D. Dolgov | arXiv, Published in 2009, 58 pages
48. Sky Surveys
    S. G. Djorgovski, A.A. Mahabal, A.J. Drake, M.J. Graham, C. Donalek | arXiv, Published in 2012, 62 pages
49. A Briefer History of Time: From the Big Bang to the Big Mac
    Eric Schulman | St. Martin's Press, Published in 2004, 207 pages
50. Cosmos and Culture: Cultural Evolution in a Cosmic Context
    Steven J. Dick, Mark L. Lupisella | NASA, Published in 2010, 612 pages
51. Mathematical Problems Of Radiative Equilibrium
    Eberhard Hopf | Cambridge University Press, Published in 1934, 123 pages
52. Chondrules and their Origins
    Elbert A. King | The Lunar and Planetary Institute, Published in 1983, 377 pages
53. Cosmic Journey: A History of Scientific Cosmology
    N. S. Hetherington, W. P. McCray | American Institute of Physics, Published in 2009
54. Space Nomads
    Leota Jean LaPaz, Lincoln LaPaz | Holiday House, Published in 1961, 199 pages
55. Photographs of Nebulae and Clusters
    James Edward Keeler | University of California Publications, Published in 1908
56. An Introduction to Galactic Chemical Evolution
    Nikos Prantzos | arXiv, Published in 2007, 46 pages
57. First Light
    Abraham Loeb | arXiv, Published in 2006, 157 pages
58. Cosmological Evolution of Galaxies
    Isaac Shlosman | arXiv, Published in 2012, 88 pages
59. Cosmology for Particle Physicists
    U. A. Yajnik | arXiv, Published in 2008, 63 pages
60. Cosmology and Astrophysics
    Juan Garcia-Bellido | arXiv.org, Published in 2005, 76 pages
61. Spherical Astronomy
    F. Brünnow | Van Nostrand, Published in 1865, 559 pages
62. Exoplanet Observing for Amateurs
    Bruce L. Gary | Reductionist Publications, Published in 2007, 170 pages
63. Gamma-Ray Bursts
    | Wikipedia, Published in 2014
64. Cosmology: The Study of the Universe
    | NASA, Published in 2009, 38 pages
65. From Disks to Planets
    Andrew N. Youdin, Scott J. Kenyon | arXiv, Published in 2012, 70 pages
66. Lectures on Astronomy, Astrophysics, and Cosmology
    Luis A. Anchordoqui | arXiv, Published in 2007, 41 pages
67. Black Holes
    P.K. Townsend | arXiv, Published in 1997, 145 pages
68. Techniques of Radio Astronomy
    T. L. Wilson | arXiv, Published in 2011, 47 pages
69. Black-Hole Phenomenology
    Neven Bilic | arXiv, Published in 2006, 58 pages
70. A Handbook of Descriptive and Practical Astronomy
    George F. Chambers | Oxford At The Clarendon Press, Published in 1889, 756 pages
71. Lectures on Inflation and Cosmological Perturbations
    David Langlois | arXiv, Published in 2010, 56 pages
72. Lunar Orbiter Photographic Atlas of the Moon
    D.E. Hughes, J.K. Bowker | Lunar and Planetary Institute, Published in 1971
73. Astronomy of To-day
    Cecil Goodrich Julius Dolmage | Seeley and co., Published in 1910
74. Why CMB physics?
    Massimo Giovannini | arXiv, Published in 2007, 179 pages
75. Primer Of Celestial Navigation
    John Favill | Cornell Maritime Press, Published in 1944, 300 pages
76. Planetary Photometry
    Max Fairbairn | , Published in 2005
77. Resources of Near-Earth Space
    J. S. Lewis, M. S. Matthews | University of Arizona Press, Published in 1993, 977 pages
78. Notes on Stellar Astrophysics
    James N. Pierce | Minnesota State University, Published in 2013, 299 pages
79. A Review of the Universe: Structures, Evolutions, Observations, and Theories
    | universe-review.ca, Published in 2009
80. Gravitational Waves: Sources, Detectors and Searches
    Keith Riles | arXiv, Published in 2012, 79 pages
81. Cosmology Primer
    Sean Carroll | preposterousuniverse.com, Published in 2012, 120 pages
82. An Overview of the Solar System
    | Wikipedia, Published in 2013
83. Ekpyrotic and Cyclic Cosmology
    Jean-Luc Lehners | arXiv, Published in 2009, 79 pages
84. Astronomy with an Opera-glass
    Garrett Putman Serviss | D. Appleton & co., Published in 1890, 154 pages
85. Multi-messenger Astronomy and Dark Matter
    Las Bergstrom | arXiv, Published in 2012, 105 pages
86. Stellar Atmospheres
    J. B. Tatum | , Published in 2006
87. Big Bang Nucleosynthesis and Physics Beyond the Standard Model
    Subir Sarkar | arXiv, Published in 1996, 156 pages
88. A Guide To The Constellations
    Samuel G. Barton | McGraw-Hill, Published in 1928, 96 pages
89. Cosmic Structure, Averaging and Dark Energy
    David L. Wiltshire | arXiv, Published in 2013, 55 pages
90. A Primer for Black Hole Quantum Physics
    R. Brout, S. Massar, R. Parentani, P. Spindel | arXiv, Published in 2007, 178 pages
91. From Chaos to Consciousness: A Brief History of the Universe
    Mike Corwin | Bookboon, Published in 2015, 166 pages
92. Observing the Sky from 30S
    Roberto Mura | Wikibooks, Published in 2010, 86 pages
93. Atomic and Molecular Processes in Astronomy and Planetary Science
    Geoffrey A. Blake | California Institute of Technology, Published in 2004
94. Evolution of the Solar System
    Hannes Alfven, Gustaf Arrhenius | NASA, Published in 1976
95. Supernovae
    | Wikipedia, Published in 2014
96. Recreations in Astronomy
    Henry White Warren | Project Gutenberg,
97. Encyclopedia of Astrophysics
    Søren Bertil F. Dorch | Scholarpedia, Published in 2009
98. Inflation
    Marieke Postma | NIKHEF, Published in 2009, 53 pages
99. Astronomical Discovery
    Herbert Hall Turner | E. Arnold, Published in 1904, 225 pages
100. Lopsided Spiral Galaxies
     Chanda J. Jog, Francoise Combes | arXiv, Published in 2008, 75 pages
101. Radiative Processes in High Energy Astrophysics
     Gabriele Ghisellini | arXiv, Published in 2012, 157 pages
102. General Astronomy
     | Wikibooks, Published in 2009
103. Neutrinos and the Stars
     Georg Raffelt | arXiv, Published in 2012, 83 pages
104. Hubble 25: A Quarter-Century of Discovery with the Hubble Space Telescope
     Dylan Steele (ed.) | NASA, Published in 2015, 78 pages
105. Observatories in Space
     Catherine Turon | arXiv, Published in 2011, 50 pages
106. Mechanism of the Heavens
     Mary Somerville | J. Murray, Published in 1831, 710 pages
107. Astrodynamics: A Compendium of Orbitology
     | Wikipedia, Published in 2013, 334 pages
108. Planetary Theory
     Ernest Brown, Clarence Shook | Cambridge University Press, Published in 1933, 323 pages
109. The Search for Extraterrestrial Intelligence, SETI
     Philip Morrison, John Billingham, John Wolfe | NASA, Published in 1979, 293 pages
110. The Beginning and the End: The Meaning of Life in a Cosmological Perspective
     Clement Vidal | arXiv, Published in 2013, 356 pages
111. Mercury
     F. Vilas, C. Chapman, M. Matthews | University of Arizona Press, Published in 1989, 794 pages
112. An Expanded View of the Universe
     | European Southern Observatory, Published in 2011, 54 pages
113. The Shape of the Universe
     Gerd Pommerenke | viXra, Published in 2013, 321 pages
114. An Introduction to Quantum Cosmology
     D.L. Wiltshire | arXiv, Published in 2003, 60 pages
115. Moon Trip: A Personal Account of the Apollo Program and its Science
     Elbert A. King | Lunar and Planetary Institute, Published in 1989, 162 pages
116. The Birth And Death Of The Sun
     George Gamow | Dover Publications, Published in 1940, 256 pages
117. Astronomy Notes
     Nick Strobel | astronomynotes.com, Published in 2010
118. Cosmic Rays and the Search for a Lorentz Invariance Violation
     Wolfgang Bietenholz | arXiv, Published in 2008, 81 pages
119. Galaxy systems in the optical and infrared
     A. Biviano | arXiv, Published in 2008, 60 pages
120. Celestial Mechanics
     J. B. Tatum | , Published in 2008
121. Large Scale Structure of the Universe
     Alison L. Coil | arXiv, Published in 2012, 43 pages
122. The Fundamentals of Stellar Astrophysics
     George W. Collins, II | W H Freeman & Co, Published in 2003, 494 pages
123. Mars Science Laboratory
     | Wikipedia, Published in 2014
124. Mathematical Theories of Planetary Motions
     Otto Dziobek | The Register Pub. Co., Published in 1892, 314 pages
125. Consolidated Lunar Atlas
     Gerald P. Kuiper, et al. | Lunar and Planetary Institute, Published in 1960
126. When Biospheres Collide: A History of NASA's Planetary Protection Programs
     Michael Meltzer | NASA, Published in 2011, 542 pages
127. Lecture Notes on High Energy Cosmic Rays
     M. Kachelriess | arXiv.org, Published in 2008, 82 pages
128. Introduction to relativistic astrophysics and cosmology through Maple
     V. L. Kalashnikov | arXiv, Published in 2001, 124 pages
129. A Practical Introduction to Numerical Hydrodynamics
     Garrelt Mellema | Leiden University, Published in 2003, 124 pages
130. Searching for Life Across Space and Time
     | The National Academies Press, Published in 2017, 133 pages
131. A Photographic Atlas of Rock Breakdown Features in Geomorphic Environments
     Mary Bourke, Heather Viles | Planetary Science Institute, Published in 2007, 88 pages
132. High Performance Computing and Numerical Modelling
     Volker Springel | arXiv, Published in 2014, 108 pages
133. Chemistry in Protoplanetary Disks
     Thomas Henning, Dmitry Semenov | arXiv, Published in 2013, 84 pages
134. Mag 7 Star Atlas Project
     Andrew L. Johnson | , Published in 2007, 21 pages
135. Hubble Space Telescope: Discoveries
     | NASA, Published in 2012, 128 pages
136. Introduction to the Theory of Black Holes
     Gerard 't Hooft | Utrecht University, Published in 2009, 49 pages
137. Habitable Planets for Man
     Stephen H. Dole | RAND Corporation, Published in 1964, 176 pages
138. Through the Telescope
     James Baikie | Adam and Charles Black, Published in 1906, 303 pages
139. Images of the Solar Upper Atmosphere From SUMER on SOHO
     Uri Feldman, at al. | ESA Publications Division, Published in 2003, 209 pages
140. Mysteries of the Sun
     Ginger Butcher | NASA, Published in 2011, 20 pages
141. The Virial Theorem in Stellar Astrophysics
     George W. Collins, II | Pachart Pub. House, Published in 1978, 135 pages
142. Trans-Neptunian Objects: An Overview
     | Wikipedia, Published in 2014
143. Voyage to Jupiter
     David Morrison, Jane Samz | NASA, Published in 1980, 218 pages
144. TASI Lectures: Introduction to Cosmology
     Mark Trodden, Sean M. Carroll | arXiv, Published in 2004, 82 pages
145. Hours With A Three-Inch Telescope
     William Noble | Longmans, Green & Co., Published in 1887, 159 pages
146. A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology
     Licia Verde | arXiv, Published in 2008, 52 pages
147. Amateur Telescope Making
     | Springfield Telescope Makers Inc, Published in 2018, 428 pages
148. Practical Astronomy
     George L. Hosmer | John Wiley and Sons Inc., Published in 1925, 314 pages
149. Voyager Encounters Jupiter
     | National Aeronautics and Space Administration, Published in 1979, 48 pages
150. An Introduction to Astronomy
     Forest Ray Moulton | The MacMillan Company, Published in 1916, 577 pages
151. Introduction to Dark Matter Experiments
     R. W. Schnee | arXiv.org, Published in 2011, 64 pages
152. The Astrobiology Primer: An Outline of General Knowledge
     Lucas J. Mix, at al. | arXiv, Published in 2006, 79 pages
153. The Geology of the Terrestrial Planets
     Michael H. Carr | NASA, Published in 1984, 322 pages
154. Great Astronomers
     Robert S. Ball | Isbister, Published in 1895, 392 pages
155. Are We Alone?
     Gregg Easterbrook | The Atlantic Monthly, Published in 1988
156. Introduction to Early Universe Cosmology
     Robert H. Brandenberger | arXiv, Published in 2011, 70 pages
157. An Introduction to the Theory of Rotating Relativistic Stars
     Eric Gourgoulhon | arXiv, Published in 2010, 88 pages
158. Voyager 1 Encounters Saturn
     | NASA, Published in 1980, 51 pages
159. Elementary Mathematical Astronomy
     C. Barlow, G. Bryan | University Correspondence College Press, Published in 1893, 442 pages
160. Special Functions: Fractional Calculus and the Pathway for Entropy
     Hans J. Haubold (ed.) | MDPI AG, Published in 2018, 306 pages
161. Supernova Remnants: The X-ray Perspective
     Jacco Vink | arXiv, Published in 2011, 78 pages
162. Cosmology: Mankind's Grand Investigation
     Greg Bothun | Harcourt Brace College Publishers, Published in 1999, 129 pages
163. Observing the Sky from 40N
     Roberto Mura | Wikibooks, Published in 2010, 86 pages
164. Lecture notes on the formation and early evolution of planetary systems
     Philip J. Armitage | arXiv, Published in 2010, 63 pages
165. Protoplanetary Disks and Their Evolution
     Jonathan P. Williams, Lucas A. Cieza | arXiv, Published in 2011, 65 pages
166. An Introduction to Cosmic Rays and Gamma-Ray Bursts
     A. De Rujula | arXiv, Published in 2007, 37 pages
167. Guidebook to the Geology of Barringer Meteorite Crater, Arizona
     David A. Kring | Lunar and Planetary Institute, Published in 2007, 154 pages
168. Astronomical Image and Data Analysis
     J.-L. Starck, F. Murtagh | Springer, Published in 2006, 335 pages
169. Elements of Astrophysics
     Nick Kaiser | University of Hawaii, Published in 2002, 435 pages
170. The world according to the Hubble Space Telescope
     Mario Livio | arXiv.org, Published in 2008, 112 pages
171. Plasma Physics of Extreme Astrophysical Environments
     Dmitri A. Uzdensky, Shane Rightley | arXiv, Published in 2014, 56 pages
172. History of Astronomy
     George Forbes | , Published in 1909
173. Man's Place in the Universe
     Alfred R. Wallace | Chapman and Hall, Published in 1904, 330 pages
174. Radiative Gas Dynamics
     David Weinberg | Ohio State University, Published in 2007
175. The History of Astrometry
     Michael Perryman | arXiv, Published in 2012, 52 pages
176. Star-Gazer's Hand-Book
     Henry William Elson | Sturgis & Walton, Published in 1910, 72 pages
177. Archaeology, Anthropology, and Interstellar Communication
     Douglas A. Vakoch | NASA, Published in 2014, 330 pages
178. Galaxies and the Expanding Universe
     James Schombert | University of Oregon, Published in 2008
179. Cosmology
     V. A. Rubakov | arXiv.org, Published in 2018, 56 pages
180. Introduction to Physical Astronomy
     Kenneth R. Koehler | University of Cincinnati, Published in 2010
181. Cosmic Microwave Background Anisotropies up to Second Order
     Nicola Bartolo, Sabino Matarrese, Antonio Riotto | arXiv, Published in 2007, 53 pages
182. Dwarf-Galaxy Cosmology
     Regina Schulte-Ladbeck, at al. | Hindawi Publishing, Published in 2010, 238 pages
183. Cosmic Rays in Galactic and Extragalactic Magnetic Fields
     F. Aharonian, A. Bykov, E. Parizot, V. Ptuskin, A. Watson | arXiv, Published in 2011, 43 pages
184. Handbook of Space Astronomy and Astrophysics
     Martin V. Zombeck | Cambridge University Press, Published in 2006, 780 pages
185. Planetary Science: A Lunar Perspective
     Stuart Ross Taylor | Lunar and Planetary Institute, Published in 1982
186. Recent Developments in Gravitational Collapse and Spacetime Singularities
     Pankaj S. Joshi, Daniele Malafarina | arXiv, Published in 2012, 89 pages
187. The First Stars
     Simon C. O. Glover | arXiv, Published in 2012, 72 pages
188. A Text-book of Astronomy
     George C. Comstock | D. Appleton and company, Published in 1901, 391 pages
189. Caldwell Catalogue
     | Wikipedia, Published in 2014
190. Vision and Voyages for Planetary Science in the Decade 2013-2022
     | National Academy of Sciences, Published in 2011, 410 pages
191. Particle Physics and Inflationary Cosmology
     Andrei Linde | arXiv, Published in 2005, 270 pages
192. Particle Physics Aspects of Modern Cosmology
     Robert H. Brandenberger | arXiv, Published in 1997, 70 pages
193. Massive Stars and their Supernovae
     F. Thielemann, R. Hirschi, M. Liebendorfer, R. Diehl | arXiv, Published in 2010, 81 pages
194. Primordial Nucleosynthesis: from precision cosmology to fundamental physics
     F. Iocco, G. Mangano, G. Miele, O. Pisanti, P.D. Serpico | arXiv, Published in 2009, 148 pages
195. Traces of Catastrophe
     Bevan M French | Lunar and Planetary Institute, Published in 1998, 120 pages
196. Basaltic Volcanism on the Terrestrial Planets
     | Pergamon Press, Published in 1981, 1286 pages
197. The Galactic Habitable Zone I. Galactic Chemical Evolution
     G. Gonzalez, D. Brownlee, P. Ward | arXiv, Published in 2001, 57 pages
198. Dynamics of the Universe in Problems
     Yu. L. Bolotin, et al. | UniverseInProblems.com, Published in 2013, 113 pages
199. Oulu Space Physics Textbook
     Reijo Rasinkangas | University of Oulu, Published in 2008
200. The Story of Eclipses
     George F. Chambers | S. S. McClure Co., Published in 1909, 208 pages
201. Modified Gravity and Cosmology
     T. Clifton, P.G. Ferreira, A. Padilla, C. Skordis | arXiv, Published in 2012, 312 pages
202. An Introduction to Celestial Mechanics
     Richard Fitzpatrick | The University of Texas at Austin, Published in 2011, 216 pages
203. Observational Probes of Cosmic Acceleration
     David H. Weinberg, et al. | arXiv, Published in 2012, 253 pages
204. The Universe in a Helium Droplet
     Grigory E. Volovik | Oxford University Press, Published in 2003, 532 pages
205. High Energy Astrophysics
     Jonathan Katz | The Benjamin/Cummings Publishing, Published in 1986, 338 pages
206. To a Rocky Moon: A Geologist's History of Lunar Exploration
     Don E. Wilhelms | University of Arizona Press, Published in 1993, 524 pages
207. A Simple Guide to Backyard Astronomy
     Carol Beigel | , Published in 2008, 61 pages
208. Views of the Solar System
     Calvin J. Hamilton | , Published in 2008
209. The Fine-Tuning of the Universe for Intelligent Life
     Luke A. Barnes | arXiv, Published in 2011, 76 pages
210. Celestial Mechanics: Notes and Work
     J.D. Mireles James | Rutgers University, Published in 2007, 128 pages
211. Advanced Topics in Cosmology: A Pedagogical Introduction
     T. Padmanabhan | arXiv, Published in 2006, 40 pages
212. Pioneer Saturn Encounter
     | NASA, Published in 1979, 45 pages
213. On the Origin (and Evolution) of Baryonic Galaxy Halos
     Duncan A. Forbes, Ericson D. Lopez | MDPI AG, Published in 2018, 232 pages
214. An Exposition on Inflationary Cosmology
     Scott Watson | arXiv, Published in 2000, 93 pages
215. The Hubble Constant
     Neal Jackson | arXiv, Published in 2014, 48 pages
216. Pioneers of Science
     Oliver Lodge | Macmillan and co, Published in 1905, 421 pages
217. String Cosmology
     James M. Cline | arXiv, Published in 2007, 47 pages
218. Gravitational Wave Detection by Interferometry
     Matthew Pitkin, Stuart Reid, Sheila Rowan, Jim Hough | arXiv, Published in 2011, 80 pages
219. Applied Cosmography: A Pedagogical Review
     Yu. L. Bolotin, et al. | arXiv.org, Published in 2018, 66 pages
220. Textbook on Practical Astronomy
     George Leonard Hosmer | Wiley, Published in 1910, 252 pages
221. Introduction to Non-Baryonic Dark Matter
     Paolo Gondolo | arXiv, Published in 2004, 51 pages
222. Superstring Cosmology
     James E. Lidsey, David Wands, E. J. Copeland | arXiv, Published in 2000, 161 pages
223. The Beginning and Evolution of the Universe
     Bharat Ratra, Michael S. Vogeley | arXiv, Published in 2008, 69 pages
224. Everything You Always Wanted To Know About The Cosmological Constant Problem
     Jerome Martin | arXiv, Published in 2012, 89 pages
225. Lectures on Black Holes, Topological Strings and Quantum Attractors
     Boris Pioline | arXiv, Published in 2007, 103 pages
226. Introduction to Supersymmetry: Astrophysical and Phenomenological Constraints
     Keith A. Olive | arXiv, Published in 1999, 67 pages
227. Origin of the Moon
     W. K. Hartmann, R. J. Phillips, G. J. Taylor | Lunar and Planetary Institute, Published in 1986, 781 pages
228. Magnetic Fields, Strings and Cosmology
     Massimo Giovannini | arXiv, Published in 2006, 76 pages
229. The Astronomy of the Bible
     E. Walter Maunder | Richard Clay & Sons, Published in 1908
230. An Introduction into the Theory of Cosmological Structure Formation
     Christian Knobel | arXiv, Published in 2012, 102 pages
231. Stellar Superfluids
     Dany Page, et al. | arXiv, Published in 2013, 88 pages
232. Curiosities of the Sky
     Garrett Putman Serviss | Harper & Brothers, Published in 1909, 300 pages
233. An introductory treatise on the lunar theory
     Ernest W Brown | Cambridge University Press, Published in 1896, 312 pages
234. Short History of Astronomy
     Arthur Berry | John Murray, Published in 1898, 439 pages
235. Advances in Modern Cosmology
     Adnan Ghribi | InTech, Published in 2011, 198 pages
236. Gravitational Wave Experiments and Early Universe Cosmology
     Michele Maggiore | arXiv, Published in 2000, 100 pages
237. Understanding Galaxy Formation and Evolution
     V. Avila-Reese | arXiv, Published in 2006, 50 pages
238. Introductory Lectures on Quantum Cosmology
     J. J. Halliwell | arXiv, Published in 1990, 107 pages
239. Ultrahigh Energy Cosmic Rays: Facts, Myths, and Legends
     Luis Alfredo Anchordoqui | arXiv, Published in 2011, 92 pages