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 Story of Eclipses
   George F. Chambers | S. S. McClure Co., Published in 1909, 208 pages
2. The Hubble Constant
   Neal Jackson | arXiv, Published in 2014, 48 pages
3. Practical Astronomy for Engineers
   Frederick Hanley Seares | Stephens, Published in 1909, 160 pages
4. Introduction to Cosmology
   David H Lyth | arXiv, Published in 1993, 53 pages
5. Curiosities of the Sky
   Garrett Putman Serviss | Harper & Brothers, Published in 1909, 300 pages
6. The Elements of Theoretical and Descriptive Astronomy
   Charles J. White | J. Wiley, Published in 1909, 322 pages
7. Observatories in Space
   Catherine Turon | arXiv, Published in 2011, 50 pages
8. The Planet Mars: A History of Observation and Discovery
   William Sheehan | University of Arizona Press, Published in 1996, 270 pages
9. An Introduction to Quantum Cosmology
   D.L. Wiltshire | arXiv, Published in 2003, 60 pages
10. Lectures on Inflation and Cosmological Perturbations
    David Langlois | arXiv, Published in 2010, 56 pages
11. Pioneers of Science
    Oliver Lodge | Macmillan and co, Published in 1905, 421 pages
12. Gravitational Waves: Sources, Detectors and Searches
    Keith Riles | arXiv, Published in 2012, 79 pages
13. The world according to the Hubble Space Telescope
    Mario Livio | arXiv.org, Published in 2008, 112 pages
14. From Disks to Planets
    Andrew N. Youdin, Scott J. Kenyon | arXiv, Published in 2012, 70 pages
15. A Simple Guide to Backyard Astronomy
    Carol Beigel | , Published in 2008, 61 pages
16. Primer Of Celestial Navigation
    John Favill | Cornell Maritime Press, Published in 1944, 300 pages
17. TASI Lectures: Introduction to Cosmology
    Mark Trodden, Sean M. Carroll | arXiv, Published in 2004, 82 pages
18. Chondrules and their Origins
    Elbert A. King | The Lunar and Planetary Institute, Published in 1983, 377 pages
19. Dense Matter in Compact Stars
    Andreas Schmitt | arXiv, Published in 2010, 146 pages
20. Habitable Planets for Man
    Stephen H. Dole | RAND Corporation, Published in 1964, 176 pages
21. Cosmic Structure, Averaging and Dark Energy
    David L. Wiltshire | arXiv, Published in 2013, 55 pages
22. A Photographic Atlas of Rock Breakdown Features in Geomorphic Environments
    Mary Bourke, Heather Viles | Planetary Science Institute, Published in 2007, 88 pages
23. The Shape of the Universe
    Gerd Pommerenke | viXra, Published in 2013, 321 pages
24. Introduction to relativistic astrophysics and cosmology through Maple
    V. L. Kalashnikov | arXiv, Published in 2001, 124 pages
25. Elements of Astrophysics
    Nick Kaiser | University of Hawaii, Published in 2002, 435 pages
26. Telescopic Work for Starlight Evenings
    William F. Denning | Taylor and Francis, Published in 1891, 372 pages
27. The Fine-Tuning of the Universe for Intelligent Life
    Luke A. Barnes | arXiv, Published in 2011, 76 pages
28. The Astronomy of the Bible
    E. Walter Maunder | Richard Clay & Sons, Published in 1908
29. Solar Neutrinos
    V. Antonelli, L. Miramonti, C. Pena-Garay, A. Serenelli | arXiv, Published in 2012, 51 pages
30. Cosmology: Mankind's Grand Investigation
    Greg Bothun | Harcourt Brace College Publishers, Published in 1999, 129 pages
31. 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
32. A Guide To The Constellations
    Samuel G. Barton | McGraw-Hill, Published in 1928, 96 pages
33. Are We Alone?
    Gregg Easterbrook | The Atlantic Monthly, Published in 1988
34. Gravitational Wave Experiments and Early Universe Cosmology
    Michele Maggiore | arXiv, Published in 2000, 100 pages
35. Mathematical Problems Of Radiative Equilibrium
    Eberhard Hopf | Cambridge University Press, Published in 1934, 123 pages
36. The History of Astrometry
    Michael Perryman | arXiv, Published in 2012, 52 pages
37. Mechanism of the Heavens
    Mary Somerville | J. Murray, Published in 1831, 710 pages
38. The Fundamentals of Stellar Astrophysics
    George W. Collins, II | W H Freeman & Co, Published in 2003, 494 pages
39. A Briefer History of Time: From the Big Bang to the Big Mac
    Eric Schulman | St. Martin's Press, Published in 2004, 207 pages
40. Short History of Astronomy
    Arthur Berry | John Murray, Published in 1898, 439 pages
41. Hours With A Three-Inch Telescope
    William Noble | Longmans, Green & Co., Published in 1887, 159 pages
42. On the Origin (and Evolution) of Baryonic Galaxy Halos
    Duncan A. Forbes, Ericson D. Lopez | MDPI AG, Published in 2018, 232 pages
43. Observing the Sky from 30S
    Roberto Mura | Wikibooks, Published in 2010, 86 pages
44. Understanding Galaxy Formation and Evolution
    V. Avila-Reese | arXiv, Published in 2006, 50 pages
45. Special Functions: Fractional Calculus and the Pathway for Entropy
    Hans J. Haubold (ed.) | MDPI AG, Published in 2018, 306 pages
46. An Expanded View of the Universe
    | European Southern Observatory, Published in 2011, 54 pages
47. Ekpyrotic and Cyclic Cosmology
    Jean-Luc Lehners | arXiv, Published in 2009, 79 pages
48. Frequently Asked Questions about Calendars
    Claus Tøndering | , Published in 2008, 65 pages
49. Traces of Catastrophe
    Bevan M French | Lunar and Planetary Institute, Published in 1998, 120 pages
50. A New Astronomy
    David Peck Todd | American Book Company, Published in 1906, 437 pages
51. Particle Physics Aspects of Modern Cosmology
    Robert H. Brandenberger | arXiv, Published in 1997, 70 pages
52. The Universe in a Helium Droplet
    Grigory E. Volovik | Oxford University Press, Published in 2003, 532 pages
53. General Astronomy
    Harold Spencer Jones | Edward Arnold and Company, Published in 1924, 392 pages
54. Great Astronomers
    Robert S. Ball | Isbister, Published in 1895, 392 pages
55. Galaxies and the Expanding Universe
    James Schombert | University of Oregon, Published in 2008
56. Introduction to Cosmology
    A. D. Dolgov | arXiv, Published in 2009, 58 pages
57. The Formation and Evolution of the Solar System
    James Schombert | University of Oregon, Published in 2007
58. Textbook on Practical Astronomy
    George Leonard Hosmer | Wiley, Published in 1910, 252 pages
59. Archaeology, Anthropology, and Interstellar Communication
    Douglas A. Vakoch | NASA, Published in 2014, 330 pages
60. Astronomical Discovery
    Herbert Hall Turner | E. Arnold, Published in 1904, 225 pages
61. Quantization in Astrophysics, Brownian Motion, and Supersymmetry
    F. Smarandache, V. Christianto | MathTiger, Published in 2007, 516 pages
62. Planetary Photometry
    Max Fairbairn | , Published in 2005
63. Magnetic Fields, Strings and Cosmology
    Massimo Giovannini | arXiv, Published in 2006, 76 pages
64. Stellar Atmospheres
    J. B. Tatum | , Published in 2006
65. Modified Gravity and Cosmology
    T. Clifton, P.G. Ferreira, A. Padilla, C. Skordis | arXiv, Published in 2012, 312 pages
66. Voyager Encounters Jupiter
    | National Aeronautics and Space Administration, Published in 1979, 48 pages
67. The Search for Extraterrestrial Intelligence, SETI
    Philip Morrison, John Billingham, John Wolfe | NASA, Published in 1979, 293 pages
68. History of Astronomy
    George Forbes | , Published in 1909
69. High Performance Computing and Numerical Modelling
    Volker Springel | arXiv, Published in 2014, 108 pages
70. Cosmological Evolution of Galaxies
    Isaac Shlosman | arXiv, Published in 2012, 88 pages
71. Lectures on Astronomy, Astrophysics, and Cosmology
    Luis A. Anchordoqui | arXiv, Published in 2007, 41 pages
72. Observations of the High Redshift Universe
    Richard S. Ellis | arXiv, Published in 2007, 115 pages
73. Voyager 1 and 2: Atlas of Six Saturnian Satellites
    Raymond M. Batson | NASA, Published in 1984, 175 pages
74. Evolution of the Solar System
    Hannes Alfven, Gustaf Arrhenius | NASA, Published in 1976
75. Pioneer Saturn Encounter
    | NASA, Published in 1979, 45 pages
76. An Overview of the Solar System
    | Wikipedia, Published in 2013
77. Consolidated Lunar Atlas
    Gerald P. Kuiper, et al. | Lunar and Planetary Institute, Published in 1960
78. Everything You Always Wanted To Know About The Cosmological Constant Problem
    Jerome Martin | arXiv, Published in 2012, 89 pages
79. Introduction to Supersymmetry: Astrophysical and Phenomenological Constraints
    Keith A. Olive | arXiv, Published in 1999, 67 pages
80. Astronomy with an Opera-glass
    Garrett Putman Serviss | D. Appleton & co., Published in 1890, 154 pages
81. Radiative Processes in High Energy Astrophysics
    Gabriele Ghisellini | arXiv, Published in 2012, 157 pages
82. Large Scale Structure of the Universe
    Alison L. Coil | arXiv, Published in 2012, 43 pages
83. Cosmic Rays in Galactic and Extragalactic Magnetic Fields
    F. Aharonian, A. Bykov, E. Parizot, V. Ptuskin, A. Watson | arXiv, Published in 2011, 43 pages
84. Astronomy for Amateurs
    Camille Flammarion | D. Appleton and Company, Published in 1910
85. A Handbook of Descriptive and Practical Astronomy
    George F. Chambers | Oxford At The Clarendon Press, Published in 1889, 756 pages
86. Solar System
    | Wikipedia, Published in 2012, 646 pages
87. Observational Probes of Cosmic Acceleration
    David H. Weinberg, et al. | arXiv, Published in 2012, 253 pages
88. The Beginning and the End: The Meaning of Life in a Cosmological Perspective
    Clement Vidal | arXiv, Published in 2013, 356 pages
89. Images of the Solar Upper Atmosphere From SUMER on SOHO
    Uri Feldman, at al. | ESA Publications Division, Published in 2003, 209 pages
90. Supernova Cosmology: Legacy and Future
    Ariel Goobar, Bruno Leibundgut | arXiv, Published in 2011, 62 pages
91. From Chaos to Consciousness: A Brief History of the Universe
    Mike Corwin | Bookboon, Published in 2015, 166 pages
92. An Exposition on Inflationary Cosmology
    Scott Watson | arXiv, Published in 2000, 93 pages
93. Lunar Orbiter Photographic Atlas of the Moon
    D.E. Hughes, J.K. Bowker | Lunar and Planetary Institute, Published in 1971
94. Notes on Stellar Astrophysics
    James N. Pierce | Minnesota State University, Published in 2013, 299 pages
95. Mercury
    F. Vilas, C. Chapman, M. Matthews | University of Arizona Press, Published in 1989, 794 pages
96. Astronomy
    Andrew Fraknoi, David Morrison, Sidney C. Wolff | Unglue.it, Published in 2016, 1200 pages
97. Elementary Mathematical Astronomy
    C. Barlow, G. Bryan | University Correspondence College Press, Published in 1893, 442 pages
98. Primordial Magnetogenesis
    Alejandra Kandus, Kerstin E. Kunze, Christos G. Tsagas | arXiv, Published in 2011, 107 pages
99. Introduction to Non-Baryonic Dark Matter
    Paolo Gondolo | arXiv, Published in 2004, 51 pages
100. First Light
     Abraham Loeb | arXiv, Published in 2006, 157 pages
101. Amateur Telescope Making
     | Springfield Telescope Makers Inc, Published in 2018, 428 pages
102. The Beginning and Evolution of the Universe
     Bharat Ratra, Michael S. Vogeley | arXiv, Published in 2008, 69 pages
103. A Practical Introduction to Numerical Hydrodynamics
     Garrelt Mellema | Leiden University, Published in 2003
104. A Primer for Black Hole Quantum Physics
     R. Brout, S. Massar, R. Parentani, P. Spindel | arXiv, Published in 2007, 178 pages
105. Astronomical Image and Data Analysis
     J.-L. Starck, F. Murtagh | Springer, Published in 2006, 335 pages
106. Cosmology
     V. A. Rubakov | arXiv.org, Published in 2018, 56 pages
107. Dark Energy: Observational Evidence and Theoretical Models
     B. Novosyadlyj, V. Pelykh, Yu. Shtanov, A. Zhuk | Akademperiodyka, Published in 2013, 380 pages
108. Planetary Theory
     Ernest Brown, Clarence Shook | Cambridge University Press, Published in 1933, 323 pages
109. A Review of the Universe: Structures, Evolutions, Observations, and Theories
     | universe-review.ca, Published in 2009
110. The Cosmic Web: Geometric Analysis
     Rien van de Weygaert, Willem Schaap | arXiv, Published in 2007, 129 pages
111. Cosmic Microwave Background Anisotropies up to Second Order
     Nicola Bartolo, Sabino Matarrese, Antonio Riotto | arXiv, Published in 2007, 53 pages
112. Mysteries of the Sun
     Ginger Butcher | NASA, Published in 2011, 20 pages
113. Plasma Physics of Extreme Astrophysical Environments
     Dmitri A. Uzdensky, Shane Rightley | arXiv, Published in 2014, 56 pages
114. To a Rocky Moon: A Geologist's History of Lunar Exploration
     Don E. Wilhelms | University of Arizona Press, Published in 1993, 524 pages
115. Gravitational Wave Detection by Interferometry
     Matthew Pitkin, Stuart Reid, Sheila Rowan, Jim Hough | arXiv, Published in 2011, 80 pages
116. Mag 7 Star Atlas Project
     Andrew L. Johnson | , Published in 2007, 21 pages
117. Neutrinos and the Stars
     Georg Raffelt | arXiv, Published in 2012, 83 pages
118. Caldwell Catalogue
     | Wikipedia, Published in 2014
119. Why CMB physics?
     Massimo Giovannini | arXiv, Published in 2007, 179 pages
120. Multi-messenger Astronomy and Dark Matter
     Las Bergstrom | arXiv, Published in 2012, 105 pages
121. Introduction to Physical Astronomy
     Kenneth R. Koehler | University of Cincinnati, Published in 2010
122. The Telescope
     Louis Bell | McGraw-Hill, Published in 1922, 294 pages
123. Introduction to the Theory of Black Holes
     Gerard 't Hooft | Utrecht University, Published in 2009, 49 pages
124. Galaxy systems in the optical and infrared
     A. Biviano | arXiv, Published in 2008, 60 pages
125. Exoplanet Observing for Amateurs
     Bruce L. Gary | Reductionist Publications, Published in 2007, 170 pages
126. Lecture Notes on High Energy Cosmic Rays
     M. Kachelriess | arXiv.org, Published in 2008, 82 pages
127. Cosmology for Particle Physicists
     U. A. Yajnik | arXiv, Published in 2008, 63 pages
128. String Cosmology
     James M. Cline | arXiv, Published in 2007, 47 pages
129. Oulu Space Physics Textbook
     Reijo Rasinkangas | University of Oulu, Published in 2008
130. Celestial Navigation, Elementary Astronomy, Piloting
     Arturo Chiesa, Raffaele Chiesa | Sky and Sea Software, Published in 2010
131. To See the Unseen: A History of Planetary Radar Astronomy
     Andrew J. Butrica | NASA History Division, Published in 1996, 301 pages
132. Vision and Voyages for Planetary Science in the Decade 2013-2022
     | National Academy of Sciences, Published in 2011, 410 pages
133. Observing the Sky from 40N
     Roberto Mura | Wikibooks, Published in 2010, 86 pages
134. Cosmology Primer
     Sean Carroll | preposterousuniverse.com, Published in 2012, 120 pages
135. Atomic and Molecular Processes in Astronomy and Planetary Science
     Geoffrey A. Blake | California Institute of Technology, Published in 2004
136. An Introduction to Cosmic Rays and Gamma-Ray Bursts
     A. De Rujula | arXiv, Published in 2007, 37 pages
137. Cosmology and Astrophysics
     Juan Garcia-Bellido | arXiv.org, Published in 2005, 76 pages
138. An Introduction to Astronomy
     Forest Ray Moulton | The MacMillan Company, Published in 1916, 577 pages
139. Stellar Superfluids
     Dany Page, et al. | arXiv, Published in 2013, 88 pages
140. Astronomy of To-day
     Cecil Goodrich Julius Dolmage | Seeley and co., Published in 1910
141. Dynamics of the Universe in Problems
     Yu. L. Bolotin, et al. | UniverseInProblems.com, Published in 2013, 113 pages
142. Hubble 25: A Quarter-Century of Discovery with the Hubble Space Telescope
     Dylan Steele (ed.) | NASA, Published in 2015, 78 pages
143. Planetary Rings
     Matthew S. Tiscareno | arXiv, Published in 2011, 82 pages
144. Trans-Neptunian Objects: An Overview
     | Wikipedia, Published in 2014
145. Atlas of Peculiar Galaxies
     Halton C. Arp | California Institute of Technology, Published in 1966, 190 pages
146. The Practical Astronomer
     Thomas Dick | Seeley, Burnside, and Seeley, Published in 1845, 588 pages
147. Introductory Lectures on Quantum Cosmology
     J. J. Halliwell | arXiv, Published in 1990, 107 pages
148. A Text-book of Astronomy
     George C. Comstock | D. Appleton and company, Published in 1901, 391 pages
149. Photographs of Nebulae and Clusters
     James Edward Keeler | University of California Publications, Published in 1908
150. Resources of Near-Earth Space
     J. S. Lewis, M. S. Matthews | University of Arizona Press, Published in 1993, 977 pages
151. Introduction to Early Universe Cosmology
     Robert H. Brandenberger | arXiv, Published in 2011, 70 pages
152. An introductory treatise on the lunar theory
     Ernest W Brown | Cambridge University Press, Published in 1896, 312 pages
153. Lecture notes on the formation and early evolution of planetary systems
     Philip J. Armitage | arXiv, Published in 2010, 63 pages
154. Through the Telescope
     James Baikie | Adam and Charles Black, Published in 1906, 303 pages
155. Practical Astronomy
     P. S. Michie, F. S. Harlow | John Wiley & Sons, Published in 1893, 246 pages
156. The Birth and Death of Stars
     James Schombert | University of Oregon, Published in 2008
157. Big Bang Nucleosynthesis and Physics Beyond the Standard Model
     Subir Sarkar | arXiv, Published in 1996, 156 pages
158. Protostars and Planets
     | Rice University, Published in 2015, 422 pages
159. The Geology of the Terrestrial Planets
     Michael H. Carr | NASA, Published in 1984, 322 pages
160. When Biospheres Collide: A History of NASA's Planetary Protection Programs
     Michael Meltzer | NASA, Published in 2011, 542 pages
161. Chemistry in Protoplanetary Disks
     Thomas Henning, Dmitry Semenov | arXiv, Published in 2013, 84 pages
162. Basaltic Volcanism on the Terrestrial Planets
     | Pergamon Press, Published in 1981, 1286 pages
163. Views of the Solar System
     Calvin J. Hamilton | , Published in 2008
164. Lopsided Spiral Galaxies
     Chanda J. Jog, Francoise Combes | arXiv, Published in 2008, 75 pages
165. Inflation
     Marieke Postma | NIKHEF, Published in 2009, 53 pages
166. From Cosmic Birth to Living Earths: The Future of UVOIR Space Astronomy
     Julianne Dalcanton, et al. | arXiv, Published in 2015, 176 pages
167. Introduction to Dark Matter Experiments
     R. W. Schnee | arXiv.org, Published in 2011, 64 pages
168. Cosmos and Culture: Cultural Evolution in a Cosmic Context
     Steven J. Dick, Mark L. Lupisella | NASA, Published in 2010, 612 pages
169. Dwarf-Galaxy Cosmology
     Regina Schulte-Ladbeck, at al. | Hindawi Publishing, Published in 2010, 238 pages
170. Gamma-Ray Bursts: Progress, Problems and Prospects
     Bing Zhang, Peter Meszaros | arXiv, Published in 2008, 87 pages
171. Advanced Topics in Cosmology: A Pedagogical Introduction
     T. Padmanabhan | arXiv, Published in 2006, 40 pages
172. Handbook of Space Astronomy and Astrophysics
     Martin V. Zombeck | Cambridge University Press, Published in 2006, 780 pages
173. Protoplanetary Disks and Their Evolution
     Jonathan P. Williams, Lucas A. Cieza | arXiv, Published in 2011, 65 pages
174. Cosmic Rays and the Search for a Lorentz Invariance Violation
     Wolfgang Bietenholz | arXiv, Published in 2008, 81 pages
175. Space Nomads
     Leota Jean LaPaz, Lincoln LaPaz | Holiday House, Published in 1961, 199 pages
176. Origin of the Moon
     W. K. Hartmann, R. J. Phillips, G. J. Taylor | Lunar and Planetary Institute, Published in 1986, 781 pages
177. Black-Hole Phenomenology
     Neven Bilic | arXiv, Published in 2006, 58 pages
178. High Energy Astrophysics
     Jonathan Katz | The Benjamin/Cummings Publishing, Published in 1986, 338 pages
179. Sky Surveys
     S. G. Djorgovski, A.A. Mahabal, A.J. Drake, M.J. Graham, C. Donalek | arXiv, Published in 2012, 62 pages
180. The Birth And Death Of The Sun
     George Gamow | Dover Publications, Published in 1940, 256 pages
181. Moon Trip: A Personal Account of the Apollo Program and its Science
     Elbert A. King | Lunar and Planetary Institute, Published in 1989, 162 pages
182. Superstring Cosmology
     James E. Lidsey, David Wands, E. J. Copeland | arXiv, Published in 2000, 161 pages
183. Mars Science Laboratory
     | Wikipedia, Published in 2014
184. Astronomy Notes
     Nick Strobel | astronomynotes.com, Published in 2010
185. The Star Splitters: The High Energy Astronomy Observatories
     Wallace H. Tucker | NASA History Office, Published in 1984, 182 pages
186. Lunar Stratigraphy and Sedimentology
     John Lindsay | Elsevier, Published in 1976, 311 pages
187. Cosmology: The Study of the Universe
     | NASA, Published in 2009, 38 pages
188. The Solar Magnetic Field
     Sami Solanki, Bernd Inhester, Manfred Schussler | arXiv, Published in 2010, 83 pages
189. An Introduction into the Theory of Cosmological Structure Formation
     Christian Knobel | arXiv, Published in 2012, 102 pages
190. Recreations in Astronomy
     Henry White Warren | Project Gutenberg,
191. Man's Place in the Universe
     Alfred R. Wallace | Chapman and Hall, Published in 1904, 330 pages
192. Voyager 1 Encounters Saturn
     | NASA, Published in 1980, 51 pages
193. An Introduction to Galactic Chemical Evolution
     Nikos Prantzos | arXiv, Published in 2007, 46 pages
194. The Astrobiology Primer: An Outline of General Knowledge
     Lucas J. Mix, at al. | arXiv, Published in 2006, 79 pages
195. Celestial Mechanics
     J. B. Tatum | , Published in 2008
196. Inflationary Cosmology and Structure Formation
     J. A. Peacock | arXiv, Published in 1996, 77 pages
197. Searching for Life Across Space and Time
     | The National Academies Press, Published in 2017, 133 pages
198. An Introduction to Celestial Mechanics
     Forest Ray Moulton | The MacMillan Company, Published in 1914, 437 pages
199. General Astronomy
     | Wikibooks, Published in 2009
200. Astrodynamics: A Compendium of Orbitology
     | Wikipedia, Published in 2013, 334 pages
201. Cosmic Journey: A History of Scientific Cosmology
     N. S. Hetherington, W. P. McCray | American Institute of Physics, Published in 2009
202. Cluster Lenses
     Jean-Paul Kneib, Priyamvada Natarajan | arXiv, Published in 2012, 120 pages
203. An Introduction to Celestial Mechanics
     Richard Fitzpatrick | The University of Texas at Austin, Published in 2011, 216 pages
204. Applied Cosmography: A Pedagogical Review
     Yu. L. Bolotin, et al. | arXiv.org, Published in 2018, 66 pages
205. Advances in Modern Cosmology
     Adnan Ghribi | InTech, Published in 2011, 198 pages
206. The Cosmological Constant
     Sean M. Carroll | arXiv, Published in 2000, 50 pages
207. Spherical Astronomy
     F. Brünnow | Van Nostrand, Published in 1865, 559 pages
208. The First Stars
     Simon C. O. Glover | arXiv, Published in 2012, 72 pages
209. Black Holes
     P.K. Townsend | arXiv, Published in 1997, 145 pages
210. Recent Developments in Gravitational Collapse and Spacetime Singularities
     Pankaj S. Joshi, Daniele Malafarina | arXiv, Published in 2012, 89 pages
211. The Virial Theorem in Stellar Astrophysics
     George W. Collins, II | Pachart Pub. House, Published in 1978, 135 pages
212. Celestial Mechanics: Notes and Work
     J.D. Mireles James | Rutgers University, Published in 2007, 128 pages
213. Supernova Remnants: The X-ray Perspective
     Jacco Vink | arXiv, Published in 2011, 78 pages
214. Guide to Lunar Orbiter Photographs
     Thomas P. Hansen | NASA, Published in 1970, 127 pages
215. Guidebook to the Geology of Barringer Meteorite Crater, Arizona
     David A. Kring | Lunar and Planetary Institute, Published in 2007, 154 pages
216. Ultrahigh Energy Cosmic Rays: Facts, Myths, and Legends
     Luis Alfredo Anchordoqui | arXiv, Published in 2011, 92 pages
217. Inflation and String Theory
     Daniel Baumann, Liam McAllister | arXiv, Published in 2014, 349 pages
218. Radiative Gas Dynamics
     David Weinberg | Ohio State University, Published in 2007
219. Gamma-Ray Bursts
     | Wikipedia, Published in 2014
220. Cosmology
     James Schombert | University of Oregon, Published in 2008
221. Astrochemistry: The Issue of Molecular Complexity in Astrophysical Environments
     M. De Becker | arXiv, Published in 2013, 62 pages
222. Star-Gazer's Hand-Book
     Henry William Elson | Sturgis & Walton, Published in 1910, 72 pages
223. Mathematical Theories of Planetary Motions
     Otto Dziobek | The Register Pub. Co., Published in 1892, 314 pages
224. The Complete Idiot's Guide to The Sun
     Jay M. Pasachoff | Alpha, Published in 2003, 350 pages
225. Practical Astronomy
     George L. Hosmer | John Wiley and Sons Inc., Published in 1925, 314 pages
226. Lectures on Black Holes, Topological Strings and Quantum Attractors
     Boris Pioline | arXiv, Published in 2007, 103 pages
227. The Galactic Habitable Zone I. Galactic Chemical Evolution
     G. Gonzalez, D. Brownlee, P. Ward | arXiv, Published in 2001, 57 pages
228. Massive Stars and their Supernovae
     F. Thielemann, R. Hirschi, M. Liebendorfer, R. Diehl | arXiv, Published in 2010, 81 pages
229. Planetary Science: A Lunar Perspective
     Stuart Ross Taylor | Lunar and Planetary Institute, Published in 1982
230. Elementary Astronomy
     James N. Pierce | , Published in 2013, 134 pages
231. Supernovae
     | Wikipedia, Published in 2014
232. Encyclopedia of Astrophysics
     Søren Bertil F. Dorch | Scholarpedia, Published in 2009
233. Voyage to Jupiter
     David Morrison, Jane Samz | NASA, Published in 1980, 218 pages
234. An Introduction to the Theory of Rotating Relativistic Stars
     Eric Gourgoulhon | arXiv, Published in 2010, 88 pages
235. Techniques of Radio Astronomy
     T. L. Wilson | arXiv, Published in 2011, 47 pages
236. The Foundations of Celestial Mechanics
     George W. Collins, II | Pachart Pub House, Published in 2004, 145 pages
237. A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology
     Licia Verde | arXiv, Published in 2008, 52 pages
238. Hubble Space Telescope: Discoveries
     | NASA, Published in 2012, 128 pages
239. Particle Physics and Inflationary Cosmology
     Andrei Linde | arXiv, Published in 2005, 270 pages
240. Advances in Global and Local Helioseismology: an Introductory Review
     Alexander G. Kosovichev | arXiv, Published in 2011, 86 pages
241. Introduction to Millimeter/Sub-Millimeter Astronomy
     T. L. Wilson | arXiv, Published in 2009, 106 pages