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. An Introduction to Celestial Mechanics
   Richard Fitzpatrick | The University of Texas at Austin, Published in 2011, 216 pages
2. High Energy Astrophysics
   Jonathan Katz | The Benjamin/Cummings Publishing, Published in 1986, 338 pages
3. Photographs of Nebulae and Clusters
   James Edward Keeler | University of California Publications, Published in 1908
4. TASI Lectures: Introduction to Cosmology
   Mark Trodden, Sean M. Carroll | arXiv, Published in 2004, 82 pages
5. Cosmic Structure, Averaging and Dark Energy
   David L. Wiltshire | arXiv, Published in 2013, 55 pages
6. The History of Astrometry
   Michael Perryman | arXiv, Published in 2012, 52 pages
7. Stellar Superfluids
   Dany Page, et al. | arXiv, Published in 2013, 88 pages
8. The Star Splitters: The High Energy Astronomy Observatories
   Wallace H. Tucker | NASA History Office, Published in 1984, 182 pages
9. Inflation and String Theory
   Daniel Baumann, Liam McAllister | arXiv, Published in 2014, 349 pages
10. Lecture Notes on High Energy Cosmic Rays
    M. Kachelriess | arXiv.org, Published in 2008, 82 pages
11. The Elements of Theoretical and Descriptive Astronomy
    Charles J. White | J. Wiley, Published in 1909, 322 pages
12. Dwarf-Galaxy Cosmology
    Regina Schulte-Ladbeck, at al. | Hindawi Publishing, Published in 2010, 238 pages
13. Neutrinos and the Stars
    Georg Raffelt | arXiv, Published in 2012, 83 pages
14. A Review of the Universe: Structures, Evolutions, Observations, and Theories
    | universe-review.ca, Published in 2009
15. Frequently Asked Questions about Calendars
    Claus Tøndering | , Published in 2008, 65 pages
16. Pioneers of Science
    Oliver Lodge | Macmillan and co, Published in 1905, 421 pages
17. Atlas of Peculiar Galaxies
    Halton C. Arp | California Institute of Technology, Published in 1966, 190 pages
18. An Introduction to Quantum Cosmology
    D.L. Wiltshire | arXiv, Published in 2003, 60 pages
19. Introduction to relativistic astrophysics and cosmology through Maple
    V. L. Kalashnikov | arXiv, Published in 2001, 124 pages
20. An Introduction to Cosmic Rays and Gamma-Ray Bursts
    A. De Rujula | arXiv, Published in 2007, 37 pages
21. Planetary Theory
    Ernest Brown, Clarence Shook | Cambridge University Press, Published in 1933, 323 pages
22. The Cosmic Web: Geometric Analysis
    Rien van de Weygaert, Willem Schaap | arXiv, Published in 2007, 129 pages
23. Lunar Orbiter Photographic Atlas of the Moon
    D.E. Hughes, J.K. Bowker | Lunar and Planetary Institute, Published in 1971
24. Advanced Topics in Cosmology: A Pedagogical Introduction
    T. Padmanabhan | arXiv, Published in 2006, 40 pages
25. Satellites of Jupiter
    David Morrison | University of Arizona Press, Published in 1982, 983 pages
26. Advances in Global and Local Helioseismology: an Introductory Review
    Alexander G. Kosovichev | arXiv, Published in 2011, 86 pages
27. Cosmic Journey: A History of Scientific Cosmology
    N. S. Hetherington, W. P. McCray | American Institute of Physics, Published in 2009, 344 pages
28. The Practical Astronomer
    Thomas Dick | Seeley, Burnside, and Seeley, Published in 1845, 588 pages
29. Astronomy with an Opera-glass
    Garrett Putman Serviss | D. Appleton & co., Published in 1890, 154 pages
30. Evolution of the Solar System
    Hannes Alfven, Gustaf Arrhenius | NASA, Published in 1976, 583 pages
31. First Light
    Abraham Loeb | arXiv, Published in 2006, 157 pages
32. The Fundamentals of Stellar Astrophysics
    George W. Collins, II | W H Freeman & Co, Published in 2003, 494 pages
33. Cosmology for Particle Physicists
    U. A. Yajnik | arXiv, Published in 2008, 63 pages
34. Telescopic Work for Starlight Evenings
    William F. Denning | Taylor and Francis, Published in 1891, 372 pages
35. The First Stars
    Simon C. O. Glover | arXiv, Published in 2012, 72 pages
36. Observational Probes of Cosmic Acceleration
    David H. Weinberg, et al. | arXiv, Published in 2012, 253 pages
37. Introduction to Early Universe Cosmology
    Robert H. Brandenberger | arXiv, Published in 2011, 70 pages
38. Traces of Catastrophe
    Bevan M French | Lunar and Planetary Institute, Published in 1998, 120 pages
39. Everything You Always Wanted To Know About The Cosmological Constant Problem
    Jerome Martin | arXiv, Published in 2012, 89 pages
40. Elements of Astrophysics
    Nick Kaiser | University of Hawaii, Published in 2002, 435 pages
41. Astronomy Notes
    Nick Strobel | astronomynotes.com, Published in 2010
42. Dynamics of the Universe in Problems
    Yu. L. Bolotin, et al. | UniverseInProblems.com, Published in 2013, 113 pages
43. Techniques of Radio Astronomy
    T. L. Wilson | arXiv, Published in 2011, 47 pages
44. Plasma Physics of Extreme Astrophysical Environments
    Dmitri A. Uzdensky, Shane Rightley | arXiv, Published in 2014, 56 pages
45. Primordial Magnetogenesis
    Alejandra Kandus, Kerstin E. Kunze, Christos G. Tsagas | arXiv, Published in 2011, 107 pages
46. Recreations in Astronomy
    Henry White Warren | Project Gutenberg,
47. Cosmological Evolution of Galaxies
    Isaac Shlosman | arXiv, Published in 2012, 88 pages
48. Mathematical Problems Of Radiative Equilibrium
    Eberhard Hopf | Cambridge University Press, Published in 1934, 123 pages
49. From Chaos to Consciousness: A Brief History of the Universe
    Mike Corwin | Bookboon, Published in 2015, 166 pages
50. The Foundations of Celestial Mechanics
    George W. Collins, II | Pachart Pub House, Published in 2004, 145 pages
51. Magnetic Fields, Strings and Cosmology
    Massimo Giovannini | arXiv, Published in 2006, 76 pages
52. The Solar Magnetic Field
    Sami Solanki, Bernd Inhester, Manfred Schussler | arXiv, Published in 2010, 83 pages
53. Observatories in Space
    Catherine Turon | arXiv, Published in 2011, 50 pages
54. Advances in Modern Cosmology
    Adnan Ghribi | InTech, Published in 2011, 198 pages
55. Vision and Voyages for Planetary Science in the Decade 2013-2022
    | National Academy of Sciences, Published in 2011, 410 pages
56. Cosmology
    James Schombert | University of Oregon, Published in 2008, 123 pages
57. Cosmology: Mankind's Grand Investigation
    Greg Bothun | Harcourt Brace College Publishers, Published in 1999, 129 pages
58. An Introduction to Galactic Chemical Evolution
    Nikos Prantzos | arXiv, Published in 2007, 46 pages
59. Basaltic Volcanism on the Terrestrial Planets
    | Pergamon Press, Published in 1981, 1286 pages
60. Protostars and Planets
    | Rice University, Published in 2015, 422 pages
61. The Search for Extraterrestrial Intelligence, SETI
    Philip Morrison, John Billingham, John Wolfe | NASA, Published in 1979, 293 pages
62. Introduction to Cosmology
    David H Lyth | arXiv, Published in 1993, 53 pages
63. History of Astronomy
    George Forbes | , Published in 1909
64. Practical Astronomy
    George L. Hosmer | John Wiley and Sons Inc., Published in 1925, 314 pages
65. Special Functions: Fractional Calculus and the Pathway for Entropy
    Hans J. Haubold (ed.) | MDPI AG, Published in 2018, 306 pages
66. Astronomy
    Andrew Fraknoi, David Morrison, Sidney C. Wolff | Unglue.it, Published in 2016, 1200 pages
67. Images of the Solar Upper Atmosphere From SUMER on SOHO
    Uri Feldman, at al. | ESA Publications Division, Published in 2003, 209 pages
68. Planetary Rings
    Matthew S. Tiscareno | arXiv, Published in 2011, 82 pages
69. Chemistry in Protoplanetary Disks
    Thomas Henning, Dmitry Semenov | arXiv, Published in 2013, 84 pages
70. Inflationary Cosmology and Structure Formation
    J. A. Peacock | arXiv, Published in 1996, 77 pages
71. The Virial Theorem in Stellar Astrophysics
    George W. Collins, II | Pachart Pub. House, Published in 1978, 135 pages
72. Voyager Encounters Jupiter
    | National Aeronautics and Space Administration, Published in 1979, 48 pages
73. Moon Trip: A Personal Account of the Apollo Program and its Science
    Elbert A. King | Lunar and Planetary Institute, Published in 1989, 162 pages
74. The Story of Eclipses
    George F. Chambers | S. S. McClure Co., Published in 1909, 208 pages
75. Cosmology and Astrophysics
    Juan Garcia-Bellido | arXiv.org, Published in 2005, 76 pages
76. Astronomy for Amateurs
    Camille Flammarion | D. Appleton and Company, Published in 1910
77. When Biospheres Collide: A History of NASA's Planetary Protection Programs
    Michael Meltzer | NASA, Published in 2011, 542 pages
78. An Introduction to Celestial Mechanics
    Forest Ray Moulton | The MacMillan Company, Published in 1914, 437 pages
79. Lectures on Inflation and Cosmological Perturbations
    David Langlois | arXiv, Published in 2010, 56 pages
80. Practical Astronomy for Engineers
    Frederick Hanley Seares | Stephens, Published in 1909, 160 pages
81. Notes on Stellar Astrophysics
    James N. Pierce | Minnesota State University, Published in 2013, 299 pages
82. Cosmos and Culture: Cultural Evolution in a Cosmic Context
    Steven J. Dick, Mark L. Lupisella | NASA, Published in 2010, 612 pages
83. The Cosmological Constant
    Sean M. Carroll | arXiv, Published in 2000, 50 pages
84. A Simple Guide to Backyard Astronomy
    Carol Beigel | , Published in 2008, 61 pages
85. Celestial Navigation, Elementary Astronomy, Piloting
    Arturo Chiesa, Raffaele Chiesa | Sky and Sea Software, Published in 2010
86. Planetary Photometry
    Max Fairbairn | , Published in 2005, 142 pages
87. The Astrobiology Primer: An Outline of General Knowledge
    Lucas J. Mix, at al. | arXiv, Published in 2006, 79 pages
88. 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
89. General Astronomy
    Harold Spencer Jones | Edward Arnold and Company, Published in 1924, 392 pages
90. Handbook of Space Astronomy and Astrophysics
    Martin V. Zombeck | Cambridge University Press, Published in 2006, 780 pages
91. Star-Gazer's Hand-Book
    Henry William Elson | Sturgis & Walton, Published in 1910, 72 pages
92. Consolidated Lunar Atlas
    Gerald P. Kuiper, et al. | Lunar and Planetary Institute, Published in 1960
93. Cluster Lenses
    Jean-Paul Kneib, Priyamvada Natarajan | arXiv, Published in 2012, 120 pages
94. A Primer for Black Hole Quantum Physics
    R. Brout, S. Massar, R. Parentani, P. Spindel | arXiv, Published in 2007, 178 pages
95. Introduction to Dark Matter Experiments
    R. W. Schnee | arXiv.org, Published in 2011, 64 pages
96. Hours With A Three-Inch Telescope
    William Noble | Longmans, Green & Co., Published in 1887, 159 pages
97. Astronomy of To-day
    Cecil Goodrich Julius Dolmage | Seeley and co., Published in 1910
98. Radiative Processes in High Energy Astrophysics
    Gabriele Ghisellini | arXiv, Published in 2012, 157 pages
99. Pioneer Saturn Encounter
    | NASA, Published in 1979, 45 pages
100. The Galactic Habitable Zone I. Galactic Chemical Evolution
     G. Gonzalez, D. Brownlee, P. Ward | arXiv, Published in 2001, 57 pages
101. On the Origin (and Evolution) of Baryonic Galaxy Halos
     Duncan A. Forbes, Ericson D. Lopez | MDPI AG, Published in 2018, 232 pages
102. Celestial Mechanics: Notes and Work
     J.D. Mireles James | Rutgers University, Published in 2007, 128 pages
103. The Complete Idiot's Guide to The Sun
     Jay M. Pasachoff | Alpha, Published in 2003, 350 pages
104. Cosmic Microwave Background Anisotropies up to Second Order
     Nicola Bartolo, Sabino Matarrese, Antonio Riotto | arXiv, Published in 2007, 53 pages
105. Amateur Telescope Making
     | Springfield Telescope Makers Inc, Published in 2018, 428 pages
106. Astronuclear Physics: a Tale of the Atomic Nuclei in the Skies
     M. Arnould, S. Goriely | arXiv.org, Published in 2020, 100 pages
107. A Photographic Atlas of Rock Breakdown Features in Geomorphic Environments
     Mary Bourke, Heather Viles | Planetary Science Institute, Published in 2007, 88 pages
108. To See the Unseen: A History of Planetary Radar Astronomy
     Andrew J. Butrica | NASA History Division, Published in 1996, 301 pages
109. Cosmology: The Study of the Universe
     | NASA, Published in 2009, 38 pages
110. Atomic and Molecular Processes in Astronomy and Planetary Science
     Geoffrey A. Blake | California Institute of Technology, Published in 2004
111. A Text-book of Astronomy
     George C. Comstock | D. Appleton and company, Published in 1901, 391 pages
112. Stellar Atmospheres
     J. B. Tatum | , Published in 2006, 302 pages
113. Gravitational Waves: Sources, Detectors and Searches
     Keith Riles | arXiv, Published in 2012, 79 pages
114. Observing the Sky from 30S
     Roberto Mura | Wikibooks, Published in 2010, 86 pages
115. The Beginning and the End: The Meaning of Life in a Cosmological Perspective
     Clement Vidal | arXiv, Published in 2013, 356 pages
116. Modified Gravity and Cosmology
     T. Clifton, P.G. Ferreira, A. Padilla, C. Skordis | arXiv, Published in 2012, 312 pages
117. Introduction to Cosmology
     A. D. Dolgov | arXiv, Published in 2009, 58 pages
118. Space Nomads
     Leota Jean LaPaz, Lincoln LaPaz | Holiday House, Published in 1961, 199 pages
119. From Disks to Planets
     Andrew N. Youdin, Scott J. Kenyon | arXiv, Published in 2012, 70 pages
120. Multi-messenger Astronomy and Dark Matter
     Las Bergstrom | arXiv, Published in 2012, 105 pages
121. The Astronomy of the Bible
     E. Walter Maunder | Richard Clay & Sons, Published in 1908
122. An Introduction to Astronomy
     Forest Ray Moulton | The MacMillan Company, Published in 1916, 577 pages
123. Gravitational Wave Detection by Interferometry
     Matthew Pitkin, Stuart Reid, Sheila Rowan, Jim Hough | arXiv, Published in 2011, 80 pages
124. Exoplanet Observing for Amateurs
     Bruce L. Gary | Reductionist Publications, Published in 2007, 170 pages
125. Sky Surveys
     S. G. Djorgovski, A.A. Mahabal, A.J. Drake, M.J. Graham, C. Donalek | arXiv, Published in 2012, 62 pages
126. Inflation
     Marieke Postma | NIKHEF, Published in 2009, 53 pages
127. Mechanism of the Heavens
     Mary Somerville | J. Murray, Published in 1831, 710 pages
128. High Performance Computing and Numerical Modelling
     Volker Springel | arXiv, Published in 2014, 108 pages
129. The Fine-Tuning of the Universe for Intelligent Life
     Luke A. Barnes | arXiv, Published in 2011, 76 pages
130. A Practical Introduction to Numerical Hydrodynamics
     Garrelt Mellema | Leiden University, Published in 2003, 124 pages
131. Cosmology Primer
     Sean Carroll | preposterousuniverse.com, Published in 2012, 120 pages
132. Encyclopedia of Astrophysics
     Søren Bertil F. Dorch | Scholarpedia, Published in 2009
133. Lectures on Astronomy, Astrophysics, and Cosmology
     Luis A. Anchordoqui | arXiv, Published in 2007, 41 pages
134. Massive Stars and their Supernovae
     F. Thielemann, R. Hirschi, M. Liebendorfer, R. Diehl | arXiv, Published in 2010, 81 pages
135. The Birth and Death of Stars
     James Schombert | University of Oregon, Published in 2008, 324 pages
136. Planetary Science: A Lunar Perspective
     Stuart Ross Taylor | Lunar and Planetary Institute, Published in 1982
137. The Formation and Evolution of the Solar System
     James Schombert | University of Oregon, Published in 2007, 233 pages
138. Ultrahigh Energy Cosmic Rays: Facts, Myths, and Legends
     Luis Alfredo Anchordoqui | arXiv, Published in 2011, 92 pages
139. Views of the Solar System
     Calvin J. Hamilton | , Published in 2008
140. Introduction to the Theory of Black Holes
     Gerard 't Hooft | Utrecht University, Published in 2009, 49 pages
141. Cosmic Rays and the Search for a Lorentz Invariance Violation
     Wolfgang Bietenholz | arXiv, Published in 2008, 81 pages
142. Voyager 1 Encounters Saturn
     | NASA, Published in 1980, 51 pages
143. Astronomical Discovery
     Herbert Hall Turner | E. Arnold, Published in 1904, 225 pages
144. The Beginning and Evolution of the Universe
     Bharat Ratra, Michael S. Vogeley | arXiv, Published in 2008, 69 pages
145. Textbook on Practical Astronomy
     George Leonard Hosmer | Wiley, Published in 1910, 252 pages
146. Radiative Gas Dynamics
     David Weinberg | Ohio State University, Published in 2007
147. Cosmology
     V. A. Rubakov | arXiv.org, Published in 2018, 56 pages
148. Primer Of Celestial Navigation
     John Favill | Cornell Maritime Press, Published in 1944, 300 pages
149. Introduction to Physical Astronomy
     Kenneth R. Koehler | University of Cincinnati, Published in 2010
150. Introductory Lectures on Quantum Cosmology
     J. J. Halliwell | arXiv, Published in 1990, 107 pages
151. Understanding Galaxy Formation and Evolution
     V. Avila-Reese | arXiv, Published in 2006, 50 pages
152. Galaxy systems in the optical and infrared
     A. Biviano | arXiv, Published in 2008, 60 pages
153. Short History of Astronomy
     Arthur Berry | John Murray, Published in 1898, 439 pages
154. Habitable Planets for Man
     Stephen H. Dole | RAND Corporation, Published in 1964, 176 pages
155. Introduction to Millimeter/Sub-Millimeter Astronomy
     T. L. Wilson | arXiv, Published in 2009, 106 pages
156. Curiosities of the Sky
     Garrett Putman Serviss | Harper & Brothers, Published in 1909, 300 pages
157. Lopsided Spiral Galaxies
     Chanda J. Jog, Francoise Combes | arXiv, Published in 2008, 75 pages
158. Mag 7 Star Atlas Project
     Andrew L. Johnson | , Published in 2007, 21 pages
159. Particle Physics and Inflationary Cosmology
     Andrei Linde | arXiv, Published in 2005, 270 pages
160. Hubble 25: A Quarter-Century of Discovery with the Hubble Space Telescope
     Dylan Steele (ed.) | NASA, Published in 2015, 78 pages
161. Are We Alone?
     Gregg Easterbrook | The Atlantic Monthly, Published in 1988
162. Recent Developments in Gravitational Collapse and Spacetime Singularities
     Pankaj S. Joshi, Daniele Malafarina | arXiv, Published in 2012, 89 pages
163. An Introduction to the Theory of Rotating Relativistic Stars
     Eric Gourgoulhon | arXiv, Published in 2010, 88 pages
164. To a Rocky Moon: A Geologist's History of Lunar Exploration
     Don E. Wilhelms | University of Arizona Press, Published in 1993, 524 pages
165. Origin of the Moon
     W. K. Hartmann, R. J. Phillips, G. J. Taylor | Lunar and Planetary Institute, Published in 1986, 781 pages
166. An introductory treatise on the lunar theory
     Ernest W Brown | Cambridge University Press, Published in 1896, 312 pages
167. Big Bang Nucleosynthesis and Physics Beyond the Standard Model
     Subir Sarkar | arXiv, Published in 1996, 156 pages
168. Introduction to Supersymmetry: Astrophysical and Phenomenological Constraints
     Keith A. Olive | arXiv, Published in 1999, 67 pages
169. Mysteries of the Sun
     Ginger Butcher | NASA, Published in 2012, 22 pages
170. Galaxies and the Expanding Universe
     James Schombert | University of Oregon, Published in 2008, 146 pages
171. Voyage to Jupiter
     David Morrison, Jane Samz | NASA, Published in 1980, 218 pages
172. Black Holes
     P.K. Townsend | arXiv, Published in 1997, 145 pages
173. Ekpyrotic and Cyclic Cosmology
     Jean-Luc Lehners | arXiv, Published in 2009, 79 pages
174. Lunar Stratigraphy and Sedimentology
     John Lindsay | Elsevier, Published in 1976, 311 pages
175. Astronomical Image and Data Analysis
     J.-L. Starck, F. Murtagh | Springer, Published in 2006, 335 pages
176. Through the Telescope
     James Baikie | Adam and Charles Black, Published in 1906, 303 pages
177. The Telescope
     Louis Bell | McGraw-Hill, Published in 1922, 294 pages
178. Resources of Near-Earth Space
     J. S. Lewis, M. S. Matthews | University of Arizona Press, Published in 1993, 977 pages
179. Dark Energy: Observational Evidence and Theoretical Models
     B. Novosyadlyj, V. Pelykh, Yu. Shtanov, A. Zhuk | Akademperiodyka, Published in 2013, 380 pages
180. Gravitational Wave Experiments and Early Universe Cosmology
     Michele Maggiore | arXiv, Published in 2000, 100 pages
181. Mercury
     F. Vilas, C. Chapman, M. Matthews | University of Arizona Press, Published in 1989, 794 pages
182. Lectures on Black Holes, Topological Strings and Quantum Attractors
     Boris Pioline | arXiv, Published in 2007, 103 pages
183. Man's Place in the Universe
     Alfred R. Wallace | Chapman and Hall, Published in 1904, 330 pages
184. Black-Hole Phenomenology
     Neven Bilic | arXiv, Published in 2006, 58 pages
185. Lecture notes on the formation and early evolution of planetary systems
     Philip J. Armitage | arXiv, Published in 2010, 63 pages
186. An Introduction into the Theory of Cosmological Structure Formation
     Christian Knobel | arXiv, Published in 2012, 102 pages
187. Quantization in Astrophysics, Brownian Motion, and Supersymmetry
     F. Smarandache, V. Christianto | MathTiger, Published in 2007, 516 pages
188. Archaeology, Anthropology, and Interstellar Communication
     Douglas A. Vakoch | NASA, Published in 2014, 330 pages
189. Solar Neutrinos
     V. Antonelli, L. Miramonti, C. Pena-Garay, A. Serenelli | arXiv, Published in 2012, 51 pages
190. Observing the Sky from 40N
     Roberto Mura | Wikibooks, Published in 2010, 86 pages
191. The Shape of the Universe
     Gerd Pommerenke | viXra, Published in 2013, 321 pages
192. Applied Cosmography: A Pedagogical Review
     Yu. L. Bolotin, et al. | arXiv.org, Published in 2018, 66 pages
193. A Briefer History of Time: From the Big Bang to the Big Mac
     Eric Schulman | St. Martin's Press, Published in 2004, 207 pages
194. Practical Astronomy
     P. S. Michie, F. S. Harlow | John Wiley & Sons, Published in 1893, 246 pages
195. The Geology of the Terrestrial Planets
     Michael H. Carr | NASA, Published in 1984, 322 pages
196. Particle Physics Aspects of Modern Cosmology
     Robert H. Brandenberger | arXiv, Published in 1997, 70 pages
197. Supernova Remnants: The X-ray Perspective
     Jacco Vink | arXiv, Published in 2011, 78 pages
198. The Birth And Death Of The Sun
     George Gamow | Dover Publications, Published in 1940, 256 pages
199. Astrochemistry: The Issue of Molecular Complexity in Astrophysical Environments
     M. De Becker | arXiv, Published in 2013, 62 pages
200. Gamma-Ray Bursts: Progress, Problems and Prospects
     Bing Zhang, Peter Meszaros | arXiv, Published in 2008, 87 pages
201. A New Astronomy
     David Peck Todd | American Book Company, Published in 1906, 437 pages
202. Why CMB physics?
     Massimo Giovannini | arXiv, Published in 2007, 179 pages
203. Searching for Life Across Space and Time
     | The National Academies Press, Published in 2017, 133 pages
204. A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology
     Licia Verde | arXiv, Published in 2008, 52 pages
205. Elementary Astronomy
     James N. Pierce | , Published in 2013, 134 pages
206. Voyager 1 and 2: Atlas of Six Saturnian Satellites
     Raymond M. Batson | NASA, Published in 1984, 182 pages
207. Great Astronomers
     Robert S. Ball | Isbister, Published in 1895, 392 pages
208. Mathematical Theories of Planetary Motions
     Otto Dziobek | The Register Pub. Co., Published in 1892, 314 pages
209. Cosmic Rays in Galactic and Extragalactic Magnetic Fields
     F. Aharonian, A. Bykov, E. Parizot, V. Ptuskin, A. Watson | arXiv, Published in 2011, 43 pages
210. String Cosmology
     James M. Cline | arXiv, Published in 2007, 47 pages
211. The Universe in a Helium Droplet
     Grigory E. Volovik | Oxford University Press, Published in 2003, 532 pages
212. A Guide To The Constellations
     Samuel G. Barton | McGraw-Hill, Published in 1928, 96 pages
213. From Cosmic Birth to Living Earths: The Future of UVOIR Space Astronomy
     Julianne Dalcanton, et al. | arXiv, Published in 2015, 176 pages
214. Elementary Mathematical Astronomy
     C. Barlow, G. Bryan | University Correspondence College Press, Published in 1893, 442 pages
215. Superstring Cosmology
     James E. Lidsey, David Wands, E. J. Copeland | arXiv, Published in 2000, 161 pages
216. A Handbook of Descriptive and Practical Astronomy
     George F. Chambers | Oxford At The Clarendon Press, Published in 1889, 756 pages
217. The world according to the Hubble Space Telescope
     Mario Livio | arXiv.org, Published in 2008, 112 pages
218. Observations of the High Redshift Universe
     Richard S. Ellis | arXiv, Published in 2007, 115 pages
219. Celestial Mechanics
     J. B. Tatum | , Published in 2008, 244 pages
220. Supernova Cosmology: Legacy and Future
     Ariel Goobar, Bruno Leibundgut | arXiv, Published in 2011, 62 pages
221. An Expanded View of the Universe
     | European Southern Observatory, Published in 2011, 54 pages
222. Introduction to Non-Baryonic Dark Matter
     Paolo Gondolo | arXiv, Published in 2004, 51 pages
223. Spherical Astronomy
     F. Brünnow | Van Nostrand, Published in 1865, 559 pages
224. Large Scale Structure of the Universe
     Alison L. Coil | arXiv, Published in 2012, 43 pages
225. Guidebook to the Geology of Barringer Meteorite Crater, Arizona
     David A. Kring | Lunar and Planetary Institute, Published in 2007, 154 pages
226. Dense Matter in Compact Stars
     Andreas Schmitt | arXiv, Published in 2010, 146 pages
227. Chondrules and their Origins
     Elbert A. King | The Lunar and Planetary Institute, Published in 1983, 377 pages
228. General Astronomy
     | Wikibooks, Published in 2009
229. An Exposition on Inflationary Cosmology
     Scott Watson | arXiv, Published in 2000, 93 pages
230. Protoplanetary Disks and Their Evolution
     Jonathan P. Williams, Lucas A. Cieza | arXiv, Published in 2011, 65 pages
231. The Hubble Constant
     Neal Jackson | arXiv, Published in 2014, 48 pages