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