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. Introduction to relativistic astrophysics and cosmology through Maple
   V. L. Kalashnikov | arXiv, Published in 2001, 124 pages
2. The Search for Extraterrestrial Intelligence, SETI
   Philip Morrison, John Billingham, John Wolfe | NASA, Published in 1979, 293 pages
3. Vision and Voyages for Planetary Science in the Decade 2013-2022
   | National Academy of Sciences, Published in 2011, 410 pages
4. Inflation and String Theory
   Daniel Baumann, Liam McAllister | arXiv, Published in 2014, 349 pages
5. The Foundations of Celestial Mechanics
   George W. Collins, II | Pachart Pub House, Published in 2004, 145 pages
6. Observing the Sky from 30S
   Roberto Mura | Wikibooks, Published in 2010, 86 pages
7. The Telescope
   Louis Bell | McGraw-Hill, Published in 1922, 294 pages
8. Large Scale Structure of the Universe
   Alison L. Coil | arXiv, Published in 2012, 43 pages
9. The Universe in a Helium Droplet
   Grigory E. Volovik | Oxford University Press, Published in 2003, 532 pages
10. Big Bang Nucleosynthesis and Physics Beyond the Standard Model
    Subir Sarkar | arXiv, Published in 1996, 156 pages
11. An Introduction to Celestial Mechanics
    Forest Ray Moulton | The MacMillan Company, Published in 1914, 437 pages
12. Notes on Stellar Astrophysics
    James N. Pierce | Minnesota State University, Published in 2013, 299 pages
13. Cosmology: The Study of the Universe
    | NASA, Published in 2009, 38 pages
14. Astronomical Discovery
    Herbert Hall Turner | E. Arnold, Published in 1904, 225 pages
15. Hubble 25: A Quarter-Century of Discovery with the Hubble Space Telescope
    Dylan Steele (ed.) | NASA, Published in 2015, 78 pages
16. Introduction to the Theory of Black Holes
    Gerard 't Hooft | Utrecht University, Published in 2009, 49 pages
17. Basaltic Volcanism on the Terrestrial Planets
    | Pergamon Press, Published in 1981, 1286 pages
18. Evolution of the Solar System
    Hannes Alfven, Gustaf Arrhenius | NASA, Published in 1976
19. Advanced Topics in Cosmology: A Pedagogical Introduction
    T. Padmanabhan | arXiv, Published in 2006, 40 pages
20. Voyager Encounters Jupiter
    | National Aeronautics and Space Administration, Published in 1979, 48 pages
21. Planetary Photometry
    Max Fairbairn | , Published in 2005, 142 pages
22. Cosmological Evolution of Galaxies
    Isaac Shlosman | arXiv, Published in 2012, 88 pages
23. Space Nomads
    Leota Jean LaPaz, Lincoln LaPaz | Holiday House, Published in 1961, 199 pages
24. The Formation and Evolution of the Solar System
    James Schombert | University of Oregon, Published in 2007
25. To See the Unseen: A History of Planetary Radar Astronomy
    Andrew J. Butrica | NASA History Division, Published in 1996, 301 pages
26. Mathematical Theories of Planetary Motions
    Otto Dziobek | The Register Pub. Co., Published in 1892, 314 pages
27. Stellar Superfluids
    Dany Page, et al. | arXiv, Published in 2013, 88 pages
28. A Simple Guide to Backyard Astronomy
    Carol Beigel | , Published in 2008, 61 pages
29. Spherical Astronomy
    F. Brünnow | Van Nostrand, Published in 1865, 559 pages
30. Cosmology for Particle Physicists
    U. A. Yajnik | arXiv, Published in 2008, 63 pages
31. A Review of the Universe: Structures, Evolutions, Observations, and Theories
    | universe-review.ca, Published in 2009
32. Stellar Atmospheres
    J. B. Tatum | , Published in 2006, 302 pages
33. History of Astronomy
    George Forbes | , Published in 1909
34. From Chaos to Consciousness: A Brief History of the Universe
    Mike Corwin | Bookboon, Published in 2015, 166 pages
35. Through the Telescope
    James Baikie | Adam and Charles Black, Published in 1906, 303 pages
36. Pioneer Saturn Encounter
    | NASA, Published in 1979, 45 pages
37. Lectures on Inflation and Cosmological Perturbations
    David Langlois | arXiv, Published in 2010, 56 pages
38. A Photographic Atlas of Rock Breakdown Features in Geomorphic Environments
    Mary Bourke, Heather Viles | Planetary Science Institute, Published in 2007, 88 pages
39. Modified Gravity and Cosmology
    T. Clifton, P.G. Ferreira, A. Padilla, C. Skordis | arXiv, Published in 2012, 312 pages
40. The Hubble Constant
    Neal Jackson | arXiv, Published in 2014, 48 pages
41. Exoplanet Observing for Amateurs
    Bruce L. Gary | Reductionist Publications, Published in 2007, 170 pages
42. Cosmology and Astrophysics
    Juan Garcia-Bellido | arXiv.org, Published in 2005, 76 pages
43. General Astronomy
    | Wikibooks, Published in 2009
44. An Exposition on Inflationary Cosmology
    Scott Watson | arXiv, Published in 2000, 93 pages
45. The Fine-Tuning of the Universe for Intelligent Life
    Luke A. Barnes | arXiv, Published in 2011, 76 pages
46. Amateur Telescope Making
    | Springfield Telescope Makers Inc, Published in 2018, 428 pages
47. Encyclopedia of Astrophysics
    Søren Bertil F. Dorch | Scholarpedia, Published in 2009
48. An Introduction to Quantum Cosmology
    D.L. Wiltshire | arXiv, Published in 2003, 60 pages
49. Introductory Lectures on Quantum Cosmology
    J. J. Halliwell | arXiv, Published in 1990, 107 pages
50. Applied Cosmography: A Pedagogical Review
    Yu. L. Bolotin, et al. | arXiv.org, Published in 2018, 66 pages
51. Mysteries of the Sun
    Ginger Butcher | NASA, Published in 2011, 20 pages
52. Dynamics of the Universe in Problems
    Yu. L. Bolotin, et al. | UniverseInProblems.com, Published in 2013, 113 pages
53. Dense Matter in Compact Stars
    Andreas Schmitt | arXiv, Published in 2010, 146 pages
54. The world according to the Hubble Space Telescope
    Mario Livio | arXiv.org, Published in 2008, 112 pages
55. Origin of the Moon
    W. K. Hartmann, R. J. Phillips, G. J. Taylor | Lunar and Planetary Institute, Published in 1986, 781 pages
56. Supernova Cosmology: Legacy and Future
    Ariel Goobar, Bruno Leibundgut | arXiv, Published in 2011, 62 pages
57. Quantization in Astrophysics, Brownian Motion, and Supersymmetry
    F. Smarandache, V. Christianto | MathTiger, Published in 2007, 516 pages
58. Lecture notes on the formation and early evolution of planetary systems
    Philip J. Armitage | arXiv, Published in 2010, 63 pages
59. Images of the Solar Upper Atmosphere From SUMER on SOHO
    Uri Feldman, at al. | ESA Publications Division, Published in 2003, 209 pages
60. Understanding Galaxy Formation and Evolution
    V. Avila-Reese | arXiv, Published in 2006, 50 pages
61. Hours With A Three-Inch Telescope
    William Noble | Longmans, Green & Co., Published in 1887, 159 pages
62. Cosmic Structure, Averaging and Dark Energy
    David L. Wiltshire | arXiv, Published in 2013, 55 pages
63. A Text-book of Astronomy
    George C. Comstock | D. Appleton and company, Published in 1901, 391 pages
64. Practical Astronomy
    P. S. Michie, F. S. Harlow | John Wiley & Sons, Published in 1893, 246 pages
65. First Light
    Abraham Loeb | arXiv, Published in 2006, 157 pages
66. The Beginning and Evolution of the Universe
    Bharat Ratra, Michael S. Vogeley | arXiv, Published in 2008, 69 pages
67. An Expanded View of the Universe
    | European Southern Observatory, Published in 2011, 54 pages
68. Massive Stars and their Supernovae
    F. Thielemann, R. Hirschi, M. Liebendorfer, R. Diehl | arXiv, Published in 2010, 81 pages
69. Lectures on Black Holes, Topological Strings and Quantum Attractors
    Boris Pioline | arXiv, Published in 2007, 103 pages
70. Gravitational Wave Experiments and Early Universe Cosmology
    Michele Maggiore | arXiv, Published in 2000, 100 pages
71. The Cosmic Web: Geometric Analysis
    Rien van de Weygaert, Willem Schaap | arXiv, Published in 2007, 129 pages
72. Introduction to Non-Baryonic Dark Matter
    Paolo Gondolo | arXiv, Published in 2004, 51 pages
73. Celestial Mechanics
    J. B. Tatum | , Published in 2008, 244 pages
74. Black-Hole Phenomenology
    Neven Bilic | arXiv, Published in 2006, 58 pages
75. The Virial Theorem in Stellar Astrophysics
    George W. Collins, II | Pachart Pub. House, Published in 1978, 135 pages
76. The History of Astrometry
    Michael Perryman | arXiv, Published in 2012, 52 pages
77. Cosmology
    James Schombert | University of Oregon, Published in 2008
78. Elementary Astronomy
    James N. Pierce | , Published in 2013, 134 pages
79. A Practical Introduction to Numerical Hydrodynamics
    Garrelt Mellema | Leiden University, Published in 2003, 124 pages
80. Inflation
    Marieke Postma | NIKHEF, Published in 2009, 53 pages
81. Lecture Notes on High Energy Cosmic Rays
    M. Kachelriess | arXiv.org, Published in 2008, 82 pages
82. Voyager 1 Encounters Saturn
    | NASA, Published in 1980, 51 pages
83. Lunar Orbiter Photographic Atlas of the Moon
    D.E. Hughes, J.K. Bowker | Lunar and Planetary Institute, Published in 1971
84. Elements of Astrophysics
    Nick Kaiser | University of Hawaii, Published in 2002, 435 pages
85. Cosmology
    V. A. Rubakov | arXiv.org, Published in 2018, 56 pages
86. Inflationary Cosmology and Structure Formation
    J. A. Peacock | arXiv, Published in 1996, 77 pages
87. Atlas of Peculiar Galaxies
    Halton C. Arp | California Institute of Technology, Published in 1966, 190 pages
88. Searching for Life Across Space and Time
    | The National Academies Press, Published in 2017, 133 pages
89. Astronomy with an Opera-glass
    Garrett Putman Serviss | D. Appleton & co., Published in 1890, 154 pages
90. Lectures on Astronomy, Astrophysics, and Cosmology
    Luis A. Anchordoqui | arXiv, Published in 2007, 41 pages
91. Voyager 1 and 2: Atlas of Six Saturnian Satellites
    Raymond M. Batson | NASA, Published in 1984, 182 pages
92. An Introduction into the Theory of Cosmological Structure Formation
    Christian Knobel | arXiv, Published in 2012, 102 pages
93. An Introduction to Cosmic Rays and Gamma-Ray Bursts
    A. De Rujula | arXiv, Published in 2007, 37 pages
94. The First Stars
    Simon C. O. Glover | arXiv, Published in 2012, 72 pages
95. Galaxy systems in the optical and infrared
    A. Biviano | arXiv, Published in 2008, 60 pages
96. Gravitational Waves: Sources, Detectors and Searches
    Keith Riles | arXiv, Published in 2012, 79 pages
97. The Birth and Death of Stars
    James Schombert | University of Oregon, Published in 2008
98. Black Holes
    P.K. Townsend | arXiv, Published in 1997, 145 pages
99. The Astronomy of the Bible
    E. Walter Maunder | Richard Clay & Sons, Published in 1908
100. Techniques of Radio Astronomy
     T. L. Wilson | arXiv, Published in 2011, 47 pages
101. Mathematical Problems Of Radiative Equilibrium
     Eberhard Hopf | Cambridge University Press, Published in 1934, 123 pages
102. On the Origin (and Evolution) of Baryonic Galaxy Halos
     Duncan A. Forbes, Ericson D. Lopez | MDPI AG, Published in 2018, 232 pages
103. Recreations in Astronomy
     Henry White Warren | Project Gutenberg,
104. Frequently Asked Questions about Calendars
     Claus Tøndering | , Published in 2008, 65 pages
105. High Energy Astrophysics
     Jonathan Katz | The Benjamin/Cummings Publishing, Published in 1986, 338 pages
106. Dwarf-Galaxy Cosmology
     Regina Schulte-Ladbeck, at al. | Hindawi Publishing, Published in 2010, 238 pages
107. Consolidated Lunar Atlas
     Gerald P. Kuiper, et al. | Lunar and Planetary Institute, Published in 1960
108. Man's Place in the Universe
     Alfred R. Wallace | Chapman and Hall, Published in 1904, 330 pages
109. Introduction to Millimeter/Sub-Millimeter Astronomy
     T. L. Wilson | arXiv, Published in 2009, 106 pages
110. The Galactic Habitable Zone I. Galactic Chemical Evolution
     G. Gonzalez, D. Brownlee, P. Ward | arXiv, Published in 2001, 57 pages
111. Cosmos and Culture: Cultural Evolution in a Cosmic Context
     Steven J. Dick, Mark L. Lupisella | NASA, Published in 2010, 612 pages
112. An Introduction to Celestial Mechanics
     Richard Fitzpatrick | The University of Texas at Austin, Published in 2011, 216 pages
113. High Performance Computing and Numerical Modelling
     Volker Springel | arXiv, Published in 2014, 108 pages
114. The Fundamentals of Stellar Astrophysics
     George W. Collins, II | W H Freeman & Co, Published in 2003, 494 pages
115. Galaxies and the Expanding Universe
     James Schombert | University of Oregon, Published in 2008
116. Introduction to Physical Astronomy
     Kenneth R. Koehler | University of Cincinnati, Published in 2010
117. Cosmology Primer
     Sean Carroll | preposterousuniverse.com, Published in 2012, 120 pages
118. Moon Trip: A Personal Account of the Apollo Program and its Science
     Elbert A. King | Lunar and Planetary Institute, Published in 1989, 162 pages
119. Photographs of Nebulae and Clusters
     James Edward Keeler | University of California Publications, Published in 1908
120. Voyage to Jupiter
     David Morrison, Jane Samz | NASA, Published in 1980, 218 pages
121. The Complete Idiot's Guide to The Sun
     Jay M. Pasachoff | Alpha, Published in 2003, 350 pages
122. From Disks to Planets
     Andrew N. Youdin, Scott J. Kenyon | arXiv, Published in 2012, 70 pages
123. Everything You Always Wanted To Know About The Cosmological Constant Problem
     Jerome Martin | arXiv, Published in 2012, 89 pages
124. Particle Physics and Inflationary Cosmology
     Andrei Linde | arXiv, Published in 2005, 270 pages
125. 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
126. Solar Neutrinos
     V. Antonelli, L. Miramonti, C. Pena-Garay, A. Serenelli | arXiv, Published in 2012, 51 pages
127. Chemistry in Protoplanetary Disks
     Thomas Henning, Dmitry Semenov | arXiv, Published in 2013, 84 pages
128. Astronomy for Amateurs
     Camille Flammarion | D. Appleton and Company, Published in 1910
129. Superstring Cosmology
     James E. Lidsey, David Wands, E. J. Copeland | arXiv, Published in 2000, 161 pages
130. Handbook of Space Astronomy and Astrophysics
     Martin V. Zombeck | Cambridge University Press, Published in 2006, 780 pages
131. Astronomy Notes
     Nick Strobel | astronomynotes.com, Published in 2010
132. Neutrinos and the Stars
     Georg Raffelt | arXiv, Published in 2012, 83 pages
133. An Introduction to the Theory of Rotating Relativistic Stars
     Eric Gourgoulhon | arXiv, Published in 2010, 88 pages
134. A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology
     Licia Verde | arXiv, Published in 2008, 52 pages
135. An introductory treatise on the lunar theory
     Ernest W Brown | Cambridge University Press, Published in 1896, 312 pages
136. Mag 7 Star Atlas Project
     Andrew L. Johnson | , Published in 2007, 21 pages
137. Telescopic Work for Starlight Evenings
     William F. Denning | Taylor and Francis, Published in 1891, 372 pages
138. A Guide To The Constellations
     Samuel G. Barton | McGraw-Hill, Published in 1928, 96 pages
139. String Cosmology
     James M. Cline | arXiv, Published in 2007, 47 pages
140. Resources of Near-Earth Space
     J. S. Lewis, M. S. Matthews | University of Arizona Press, Published in 1993, 977 pages
141. Are We Alone?
     Gregg Easterbrook | The Atlantic Monthly, Published in 1988
142. General Astronomy
     Harold Spencer Jones | Edward Arnold and Company, Published in 1924, 392 pages
143. Views of the Solar System
     Calvin J. Hamilton | , Published in 2008
144. TASI Lectures: Introduction to Cosmology
     Mark Trodden, Sean M. Carroll | arXiv, Published in 2004, 82 pages
145. Curiosities of the Sky
     Garrett Putman Serviss | Harper & Brothers, Published in 1909, 300 pages
146. A Handbook of Descriptive and Practical Astronomy
     George F. Chambers | Oxford At The Clarendon Press, Published in 1889, 756 pages
147. Mercury
     F. Vilas, C. Chapman, M. Matthews | University of Arizona Press, Published in 1989, 794 pages
148. Ekpyrotic and Cyclic Cosmology
     Jean-Luc Lehners | arXiv, Published in 2009, 79 pages
149. The Star Splitters: The High Energy Astronomy Observatories
     Wallace H. Tucker | NASA History Office, Published in 1984, 182 pages
150. Habitable Planets for Man
     Stephen H. Dole | RAND Corporation, Published in 1964, 176 pages
151. Multi-messenger Astronomy and Dark Matter
     Las Bergstrom | arXiv, Published in 2012, 105 pages
152. Special Functions: Fractional Calculus and the Pathway for Entropy
     Hans J. Haubold (ed.) | MDPI AG, Published in 2018, 306 pages
153. Planetary Rings
     Matthew S. Tiscareno | arXiv, Published in 2011, 82 pages
154. Advances in Modern Cosmology
     Adnan Ghribi | InTech, Published in 2011, 198 pages
155. Protostars and Planets
     | Rice University, Published in 2015, 422 pages
156. Star-Gazer's Hand-Book
     Henry William Elson | Sturgis & Walton, Published in 1910, 72 pages
157. Atomic and Molecular Processes in Astronomy and Planetary Science
     Geoffrey A. Blake | California Institute of Technology, Published in 2004
158. Astrochemistry: The Issue of Molecular Complexity in Astrophysical Environments
     M. De Becker | arXiv, Published in 2013, 62 pages
159. Plasma Physics of Extreme Astrophysical Environments
     Dmitri A. Uzdensky, Shane Rightley | arXiv, Published in 2014, 56 pages
160. Protoplanetary Disks and Their Evolution
     Jonathan P. Williams, Lucas A. Cieza | arXiv, Published in 2011, 65 pages
161. Gamma-Ray Bursts: Progress, Problems and Prospects
     Bing Zhang, Peter Meszaros | arXiv, Published in 2008, 87 pages
162. The Birth And Death Of The Sun
     George Gamow | Dover Publications, Published in 1940, 256 pages
163. Astronomical Image and Data Analysis
     J.-L. Starck, F. Murtagh | Springer, Published in 2006, 335 pages
164. A Primer for Black Hole Quantum Physics
     R. Brout, S. Massar, R. Parentani, P. Spindel | arXiv, Published in 2007, 178 pages
165. Introduction to Cosmology
     A. D. Dolgov | arXiv, Published in 2009, 58 pages
166. Guidebook to the Geology of Barringer Meteorite Crater, Arizona
     David A. Kring | Lunar and Planetary Institute, Published in 2007, 154 pages
167. Great Astronomers
     Robert S. Ball | Isbister, Published in 1895, 392 pages
168. Textbook on Practical Astronomy
     George Leonard Hosmer | Wiley, Published in 1910, 252 pages
169. Pioneers of Science
     Oliver Lodge | Macmillan and co, Published in 1905, 421 pages
170. The Solar Magnetic Field
     Sami Solanki, Bernd Inhester, Manfred Schussler | arXiv, Published in 2010, 83 pages
171. Practical Astronomy for Engineers
     Frederick Hanley Seares | Stephens, Published in 1909, 160 pages
172. The Elements of Theoretical and Descriptive Astronomy
     Charles J. White | J. Wiley, Published in 1909, 322 pages
173. Elementary Mathematical Astronomy
     C. Barlow, G. Bryan | University Correspondence College Press, Published in 1893, 442 pages
174. Radiative Processes in High Energy Astrophysics
     Gabriele Ghisellini | arXiv, Published in 2012, 157 pages
175. The Astrobiology Primer: An Outline of General Knowledge
     Lucas J. Mix, at al. | arXiv, Published in 2006, 79 pages
176. Introduction to Supersymmetry: Astrophysical and Phenomenological Constraints
     Keith A. Olive | arXiv, Published in 1999, 67 pages
177. Observations of the High Redshift Universe
     Richard S. Ellis | arXiv, Published in 2007, 115 pages
178. Observing the Sky from 40N
     Roberto Mura | Wikibooks, Published in 2010, 86 pages
179. Gravitational Wave Detection by Interferometry
     Matthew Pitkin, Stuart Reid, Sheila Rowan, Jim Hough | arXiv, Published in 2011, 80 pages
180. Celestial Navigation, Elementary Astronomy, Piloting
     Arturo Chiesa, Raffaele Chiesa | Sky and Sea Software, Published in 2010
181. Astronomy
     Andrew Fraknoi, David Morrison, Sidney C. Wolff | Unglue.it, Published in 2016, 1200 pages
182. Short History of Astronomy
     Arthur Berry | John Murray, Published in 1898, 439 pages
183. The Beginning and the End: The Meaning of Life in a Cosmological Perspective
     Clement Vidal | arXiv, Published in 2013, 356 pages
184. Recent Developments in Gravitational Collapse and Spacetime Singularities
     Pankaj S. Joshi, Daniele Malafarina | arXiv, Published in 2012, 89 pages
185. Celestial Mechanics: Notes and Work
     J.D. Mireles James | Rutgers University, Published in 2007, 128 pages
186. Why CMB physics?
     Massimo Giovannini | arXiv, Published in 2007, 179 pages
187. Planetary Theory
     Ernest Brown, Clarence Shook | Cambridge University Press, Published in 1933, 323 pages
188. Introduction to Early Universe Cosmology
     Robert H. Brandenberger | arXiv, Published in 2011, 70 pages
189. Cosmic Rays in Galactic and Extragalactic Magnetic Fields
     F. Aharonian, A. Bykov, E. Parizot, V. Ptuskin, A. Watson | arXiv, Published in 2011, 43 pages
190. Archaeology, Anthropology, and Interstellar Communication
     Douglas A. Vakoch | NASA, Published in 2014, 330 pages
191. Cosmology: Mankind's Grand Investigation
     Greg Bothun | Harcourt Brace College Publishers, Published in 1999, 129 pages
192. Astronuclear Physics: a Tale of the Atomic Nuclei in the Skies
     M. Arnould, S. Goriely | arXiv.org, Published in 2020, 100 pages
193. The Shape of the Universe
     Gerd Pommerenke | viXra, Published in 2013, 321 pages
194. From Cosmic Birth to Living Earths: The Future of UVOIR Space Astronomy
     Julianne Dalcanton, et al. | arXiv, Published in 2015, 176 pages
195. The Geology of the Terrestrial Planets
     Michael H. Carr | NASA, Published in 1984, 322 pages
196. Cosmic Rays and the Search for a Lorentz Invariance Violation
     Wolfgang Bietenholz | arXiv, Published in 2008, 81 pages
197. Lunar Stratigraphy and Sedimentology
     John Lindsay | Elsevier, Published in 1976, 311 pages
198. Advances in Global and Local Helioseismology: an Introductory Review
     Alexander G. Kosovichev | arXiv, Published in 2011, 86 pages
199. The Story of Eclipses
     George F. Chambers | S. S. McClure Co., Published in 1909, 208 pages
200. Observatories in Space
     Catherine Turon | arXiv, Published in 2011, 50 pages
201. A New Astronomy
     David Peck Todd | American Book Company, Published in 1906, 437 pages
202. Observational Probes of Cosmic Acceleration
     David H. Weinberg, et al. | arXiv, Published in 2012, 253 pages
203. Radiative Gas Dynamics
     David Weinberg | Ohio State University, Published in 2007
204. The Practical Astronomer
     Thomas Dick | Seeley, Burnside, and Seeley, Published in 1845, 588 pages
205. Ultrahigh Energy Cosmic Rays: Facts, Myths, and Legends
     Luis Alfredo Anchordoqui | arXiv, Published in 2011, 92 pages
206. Planetary Science: A Lunar Perspective
     Stuart Ross Taylor | Lunar and Planetary Institute, Published in 1982
207. Cluster Lenses
     Jean-Paul Kneib, Priyamvada Natarajan | arXiv, Published in 2012, 120 pages
208. Primordial Magnetogenesis
     Alejandra Kandus, Kerstin E. Kunze, Christos G. Tsagas | arXiv, Published in 2011, 107 pages
209. Dark Energy: Observational Evidence and Theoretical Models
     B. Novosyadlyj, V. Pelykh, Yu. Shtanov, A. Zhuk | Akademperiodyka, Published in 2013, 380 pages
210. A Briefer History of Time: From the Big Bang to the Big Mac
     Eric Schulman | St. Martin's Press, Published in 2004, 207 pages
211. Primer Of Celestial Navigation
     John Favill | Cornell Maritime Press, Published in 1944, 300 pages
212. Traces of Catastrophe
     Bevan M French | Lunar and Planetary Institute, Published in 1998, 120 pages
213. Mechanism of the Heavens
     Mary Somerville | J. Murray, Published in 1831, 710 pages
214. Magnetic Fields, Strings and Cosmology
     Massimo Giovannini | arXiv, Published in 2006, 76 pages
215. When Biospheres Collide: A History of NASA's Planetary Protection Programs
     Michael Meltzer | NASA, Published in 2011, 542 pages
216. Astronomy of To-day
     Cecil Goodrich Julius Dolmage | Seeley and co., Published in 1910
217. Particle Physics Aspects of Modern Cosmology
     Robert H. Brandenberger | arXiv, Published in 1997, 70 pages
218. Introduction to Dark Matter Experiments
     R. W. Schnee | arXiv.org, Published in 2011, 64 pages
219. Cosmic Microwave Background Anisotropies up to Second Order
     Nicola Bartolo, Sabino Matarrese, Antonio Riotto | arXiv, Published in 2007, 53 pages
220. An Introduction to Astronomy
     Forest Ray Moulton | The MacMillan Company, Published in 1916, 577 pages
221. Lopsided Spiral Galaxies
     Chanda J. Jog, Francoise Combes | arXiv, Published in 2008, 75 pages
222. To a Rocky Moon: A Geologist's History of Lunar Exploration
     Don E. Wilhelms | University of Arizona Press, Published in 1993, 524 pages
223. Sky Surveys
     S. G. Djorgovski, A.A. Mahabal, A.J. Drake, M.J. Graham, C. Donalek | arXiv, Published in 2012, 62 pages
224. Chondrules and their Origins
     Elbert A. King | The Lunar and Planetary Institute, Published in 1983, 377 pages
225. Introduction to Cosmology
     David H Lyth | arXiv, Published in 1993, 53 pages
226. An Introduction to Galactic Chemical Evolution
     Nikos Prantzos | arXiv, Published in 2007, 46 pages
227. Cosmic Journey: A History of Scientific Cosmology
     N. S. Hetherington, W. P. McCray | American Institute of Physics, Published in 2009, 344 pages
228. Supernova Remnants: The X-ray Perspective
     Jacco Vink | arXiv, Published in 2011, 78 pages
229. The Cosmological Constant
     Sean M. Carroll | arXiv, Published in 2000, 50 pages
230. Practical Astronomy
     George L. Hosmer | John Wiley and Sons Inc., Published in 1925, 314 pages