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