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.

      

001. The First Stars
       Simon C. O. Glover | arXiv
       Published in 2012, 72 pages

002. Cosmic Rays and the Search for a Lorentz Invariance Violation
       Wolfgang Bietenholz | arXiv
       Published in 2008, 81 pages

003. Quantization in Astrophysics, Brownian Motion, and Supersymmetry
       F. Smarandache, V. Christianto | MathTiger
       Published in 2007, 516 pages

004. The Formation and Evolution of the Solar System
       James Schombert | University of Oregon
       Published in 2007

005. Mars Science Laboratory
        | Wikipedia
       Published in 2014

006. Advances in Global and Local Helioseismology: an Introductory Review
       Alexander G. Kosovichev | arXiv
       Published in 2011, 86 pages

007. Elements of Astrophysics
       Nick Kaiser | University of Hawaii
       Published in 2002, 435 pages

008. Understanding Galaxy Formation and Evolution
       V. Avila-Reese | arXiv
       Published in 2006, 50 pages

009. Observational Probes of Cosmic Acceleration
       David H. Weinberg, et al. | arXiv
       Published in 2012, 253 pages

010. Recreations in Astronomy
       Henry White Warren | Project Gutenberg
       

011. Chemistry in Protoplanetary Disks
       Thomas Henning, Dmitry Semenov | arXiv
       Published in 2013, 84 pages

012. Everything You Always Wanted To Know About The Cosmological Constant Problem
       Jerome Martin | arXiv
       Published in 2012, 89 pages

013. Basaltic Volcanism on the Terrestrial Planets
        | Pergamon Press
       Published in 1981, 1286 pages

014. Evolution of the Solar System
       Hannes Alfven, Gustaf Arrhenius | NASA
       Published in 1976

015. Atlas of Peculiar Galaxies
       Halton C. Arp | California Institute of Technology
       Published in 1966, 190 pages

016. Elementary Astronomy
       James N. Pierce |
       Published in 2013, 134 pages

017. An Introduction to Galactic Chemical Evolution
       Nikos Prantzos | arXiv
       Published in 2007, 46 pages

018. Inflation
       Marieke Postma | NIKHEF
       Published in 2009, 53 pages

019. Celestial Mechanics: Notes and Work
       J.D. Mireles James | Rutgers University
       Published in 2007

020. Cluster Lenses
       Jean-Paul Kneib, Priyamvada Natarajan | arXiv
       Published in 2012, 120 pages

021. Hubble 25: A Quarter-Century of Discovery with the Hubble Space Telescope
       Dylan Steele (ed.) | NASA
       Published in 2015, 78 pages

022. Recent Developments in Gravitational Collapse and Spacetime Singularities
       Pankaj S. Joshi, Daniele Malafarina | arXiv
       Published in 2012, 89 pages

023. Cosmology for Particle Physicists
       U. A. Yajnik | arXiv
       Published in 2008, 63 pages

024. The Beginning and Evolution of the Universe
       Bharat Ratra, Michael S. Vogeley | arXiv
       Published in 2008, 69 pages

025. Archaeology, Anthropology, and Interstellar Communication
       Douglas A. Vakoch | NASA
       Published in 2014, 330 pages

026. Primordial Magnetogenesis
       Alejandra Kandus, Kerstin E. Kunze, Christos G. Tsagas | arXiv
       Published in 2011, 107 pages

027. Celestial Navigation, Elementary Astronomy, Piloting
       Arturo Chiesa, Raffaele Chiesa | Sky and Sea Software
       Published in 2010

028. The Beginning and the End: The Meaning of Life in a Cosmological Perspective
       Clement Vidal | arXiv
       Published in 2013, 356 pages

029. Through the Telescope
       James Baikie | Adam and Charles Black
       Published in 1906, 303 pages

030. Gamma-Ray Bursts
        | Wikipedia
       Published in 2014

031. Lectures on Black Holes, Topological Strings and Quantum Attractors
       Boris Pioline | arXiv
       Published in 2007, 103 pages

032. The Cosmological Constant
       Sean M. Carroll | arXiv
       Published in 2000, 50 pages

033. Gravitational Waves: Sources, Detectors and Searches
       Keith Riles | arXiv
       Published in 2012, 79 pages

034. A Primer for Black Hole Quantum Physics
       R. Brout, S. Massar, R. Parentani, P. Spindel | arXiv
       Published in 2007, 178 pages

035. Views of the Solar System
       Calvin J. Hamilton |
       Published in 2008

036. Exoplanet Observing for Amateurs
       Bruce L. Gary | Reductionist Publications
       Published in 2007, 170 pages

037. From Cosmic Birth to Living Earths: The Future of UVOIR Space Astronomy
       Julianne Dalcanton, et al. | arXiv
       Published in 2015, 176 pages

038. Astronomy with an Opera-glass
       Garrett Putman Serviss | D. Appleton & co.
       Published in 1890, 154 pages

039. Mysteries of the Sun
       Ginger Butcher | NASA
       Published in 2011, 20 pages

040. Notes on Stellar Astrophysics
       James N. Pierce | Minnesota State University
       Published in 2013, 299 pages

041. A Handbook of Descriptive and Practical Astronomy
       George F. Chambers | Oxford At The Clarendon Press
       Published in 1889, 756 pages

042. Handbook of Space Astronomy and Astrophysics
       Martin V. Zombeck | Cambridge University Press
       Published in 2006, 780 pages

043. Introduction to Supersymmetry: Astrophysical and Phenomenological Constraints
       Keith A. Olive | arXiv
       Published in 1999, 67 pages

044. Astronomy Notes
       Nick Strobel | astronomynotes.com
       Published in 2010

045. Observing the Sky from 40N
       Roberto Mura | Wikibooks
       Published in 2010, 86 pages

046. Mercury
       F. Vilas, C. Chapman, M. Matthews | University of Arizona Press
       Published in 1989, 794 pages

047. Voyager 1 and 2: Atlas of Six Saturnian Satellites
       Raymond M. Batson | NASA
       Published in 1984, 175 pages

048. Planetary Science: A Lunar Perspective
       Stuart Ross Taylor | Lunar and Planetary Institute
       Published in 1982

049. Resources of Near-Earth Space
       J. S. Lewis, M. S. Matthews | University of Arizona Press
       Published in 1993, 977 pages

050. The world according to the Hubble Space Telescope
       Mario Livio | arXiv.org
       Published in 2008, 112 pages

051. Particle Physics Aspects of Modern Cosmology
       Robert H. Brandenberger | arXiv
       Published in 1997, 70 pages

052. Cosmology: The Study of the Universe
        | NASA
       Published in 2009, 38 pages

053. The Planet Mars: A History of Observation and Discovery
       William Sheehan | University of Arizona Press
       Published in 1996, 270 pages

054. Astronomical Image and Data Analysis
       J.-L. Starck, F. Murtagh | Springer
       Published in 2006, 335 pages

055. Pioneers of Science
       Oliver Lodge | Macmillan and co
       Published in 1905, 421 pages

056. Cosmological Evolution of Galaxies
       Isaac Shlosman | arXiv
       Published in 2012, 88 pages

057. Stellar Atmospheres
       J. B. Tatum |
       Published in 2006

058. Supernova Remnants: The X-ray Perspective
       Jacco Vink | arXiv
       Published in 2011, 78 pages

059. The Astronomy of the Bible
       E. Walter Maunder | Richard Clay & Sons
       Published in 1908

060. The Fine-Tuning of the Universe for Intelligent Life
       Luke A. Barnes | arXiv
       Published in 2011, 76 pages

061. Introduction to Physical Astronomy
       Kenneth R. Koehler | University of Cincinnati
       Published in 2010

062. Are We Alone?
       Gregg Easterbrook | The Atlantic Monthly
       Published in 1988

063. Neutrinos and the Stars
       Georg Raffelt | arXiv
       Published in 2012, 83 pages

064. Oulu Space Physics Textbook
       Reijo Rasinkangas | University of Oulu
       Published in 2008

065. Practical Astronomy for Engineers
       Frederick Hanley Seares | Stephens
       Published in 1909, 160 pages

066. The Shape of the Universe
       Gerd Pommerenke | viXra
       Published in 2013, 321 pages

067. Large Scale Structure of the Universe
       Alison L. Coil | arXiv
       Published in 2012, 43 pages

068. Cosmic Journey: A History of Scientific Cosmology
       N. S. Hetherington, W. P. McCray | American Institute of Physics
       Published in 2009

069. History of Astronomy
       George Forbes |
       Published in 1909

070. Black-Hole Phenomenology
       Neven Bilic | arXiv
       Published in 2006, 58 pages

071. Astrochemistry: The Issue of Molecular Complexity in Astrophysical Environments
       M. De Becker | arXiv
       Published in 2013, 62 pages

072. Superstring Cosmology
       James E. Lidsey, David Wands, E. J. Copeland | arXiv
       Published in 2000, 161 pages

073. Primer Of Celestial Navigation
       John Favill | Cornell Maritime Press
       Published in 1944, 300 pages

074. TASI Lectures: Introduction to Cosmology
       Mark Trodden, Sean M. Carroll | arXiv
       Published in 2004, 82 pages

075. Observatories in Space
       Catherine Turon | arXiv
       Published in 2011, 50 pages

076. Lectures on Astronomy, Astrophysics, and Cosmology
       Luis A. Anchordoqui | arXiv
       Published in 2007, 41 pages

077. Elementary Mathematical Astronomy
       C. Barlow, G. Bryan | University Correspondence College Press
       Published in 1893, 442 pages

078. A New Astronomy
       David Peck Todd | American Book Company
       Published in 1906, 437 pages

079. A Text-book of Astronomy
       George C. Comstock | D. Appleton and company
       Published in 1901, 391 pages

080. From Disks to Planets
       Andrew N. Youdin, Scott J. Kenyon | arXiv
       Published in 2012, 70 pages

081. A Photographic Atlas of Rock Breakdown Features in Geomorphic Environments
       Mary Bourke, Heather Viles | Planetary Science Institute
       Published in 2007, 88 pages

082. Mechanism of the Heavens
       Mary Somerville | J. Murray
       Published in 1831, 710 pages

083. General Astronomy
        | Wikibooks
       Published in 2009

084. The Hubble Constant
       Neal Jackson | arXiv
       Published in 2014, 48 pages

085. The Fundamentals of Stellar Astrophysics
       George W. Collins, II | W H Freeman & Co
       Published in 2003, 494 pages

086. Ultrahigh Energy Cosmic Rays: Facts, Myths, and Legends
       Luis Alfredo Anchordoqui | arXiv
       Published in 2011, 92 pages

087. Lunar Orbiter Photographic Atlas of the Moon
       D.E. Hughes, J.K. Bowker | Lunar and Planetary Institute
       Published in 1971

088. 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

089. Gravitational Wave Experiments and Early Universe Cosmology
       Michele Maggiore | arXiv
       Published in 2000, 100 pages

090. Cosmic Structure, Averaging and Dark Energy
       David L. Wiltshire | arXiv
       Published in 2013, 55 pages

091. Particle Physics and Inflationary Cosmology
       Andrei Linde | arXiv
       Published in 2005, 270 pages

092. The Galactic Habitable Zone I. Galactic Chemical Evolution
       G. Gonzalez, D. Brownlee, P. Ward | arXiv
       Published in 2001, 57 pages

093. When Biospheres Collide: A History of NASA's Planetary Protection Programs
       Michael Meltzer | NASA
       Published in 2011, 542 pages

094. Dynamics of the Universe in Problems
       Yu. L. Bolotin, et al. | UniverseInProblems.com
       Published in 2013, 113 pages

095. Space Nomads
       Leota Jean LaPaz, Lincoln LaPaz | Holiday House
       Published in 1961, 199 pages

096. Origin of the Moon
       W. K. Hartmann, R. J. Phillips, G. J. Taylor | Lunar and Planetary Institute
       Published in 1986, 781 pages

097. A Simple Guide to Backyard Astronomy
       Carol Beigel |
       Published in 2008, 61 pages

098. An Introduction to Celestial Mechanics
       Richard Fitzpatrick | The University of Texas at Austin
       Published in 2011, 216 pages

099. Modified Gravity and Cosmology
       T. Clifton, P.G. Ferreira, A. Padilla, C. Skordis | arXiv
       Published in 2012, 312 pages

100. Gravitational Wave Detection by Interferometry
       Matthew Pitkin, Stuart Reid, Sheila Rowan, Jim Hough | arXiv
       Published in 2011, 80 pages

101. Practical Astronomy
       George L. Hosmer | John Wiley and Sons Inc.
       Published in 1925, 314 pages

102. Astrodynamics: A Compendium of Orbitology
        | Wikipedia
       Published in 2013, 334 pages

103. Great Astronomers
       Robert S. Ball | Isbister
       Published in 1895, 392 pages

104. The Complete Idiot's Guide to The Sun
       Jay M. Pasachoff | Alpha
       Published in 2003, 350 pages

105. Mag 7 Star Atlas Project
       Andrew L. Johnson |
       Published in 2007, 21 pages

106. Curiosities of the Sky
       Garrett Putman Serviss | Harper & Brothers
       Published in 1909, 300 pages

107. Lunar Stratigraphy and Sedimentology
       John Lindsay | Elsevier
       Published in 1976, 311 pages

108. Inflation and String Theory
       Daniel Baumann, Liam McAllister | arXiv
       Published in 2014, 349 pages

109. A Practical Introduction to Numerical Hydrodynamics
       Garrelt Mellema | Leiden University
       Published in 2003

110. The History of Astrometry
       Michael Perryman | arXiv
       Published in 2012, 52 pages

111. Supernova Cosmology: Legacy and Future
       Ariel Goobar, Bruno Leibundgut | arXiv
       Published in 2011, 62 pages

112. Gamma-Ray Bursts: Progress, Problems and Prospects
       Bing Zhang, Peter Meszaros | arXiv
       Published in 2008, 87 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. Astronomy of To-day
       Cecil Goodrich Julius Dolmage | Seeley and co.
       Published in 1910

115. Solar Neutrinos
       V. Antonelli, L. Miramonti, C. Pena-Garay, A. Serenelli | arXiv
       Published in 2012, 51 pages

116. A Briefer History of Time: From the Big Bang to the Big Mac
       Eric Schulman | St. Martin's Press
       Published in 2004, 207 pages

117. Radiative Gas Dynamics
       David Weinberg | Ohio State University
       Published in 2007

118. An Expanded View of the Universe
        | European Southern Observatory
       Published in 2011, 54 pages

119. Introduction to Non-Baryonic Dark Matter
       Paolo Gondolo | arXiv
       Published in 2004, 51 pages

120. Cosmology: Mankind's Grand Investigation
       Greg Bothun | Harcourt Brace College Publishers
       Published in 1999, 129 pages

121. First Light
       Abraham Loeb | arXiv
       Published in 2006, 157 pages

122. An Introduction into the Theory of Cosmological Structure Formation
       Christian Knobel | arXiv
       Published in 2012, 102 pages

123. Practical Astronomy
       P. S. Michie, F. S. Harlow | John Wiley & Sons
       Published in 1893, 246 pages

124. Lectures on Inflation and Cosmological Perturbations
       David Langlois | arXiv
       Published in 2010, 56 pages

125. A Guide To The Constellations
       Samuel G. Barton | McGraw-Hill
       Published in 1928, 96 pages

126. Ekpyrotic and Cyclic Cosmology
       Jean-Luc Lehners | arXiv
       Published in 2009, 79 pages

127. The Practical Astronomer
       Thomas Dick | Seeley, Burnside, and Seeley
       Published in 1845, 588 pages

128. Astronomy
       Andrew Fraknoi, David Morrison, Sidney C. Wolff | Unglue.it
       Published in 2016, 1200 pages

129. The Star Splitters: The High Energy Astronomy Observatories
       Wallace H. Tucker | NASA History Office
       Published in 1984, 182 pages

130. Magnetic Fields, Strings and Cosmology
       Massimo Giovannini | arXiv
       Published in 2006, 76 pages

131. The Elements of Theoretical and Descriptive Astronomy
       Charles J. White | J. Wiley
       Published in 1909, 322 pages

132. High Performance Computing and Numerical Modelling
       Volker Springel | arXiv
       Published in 2014, 108 pages

133. Cosmology Primer
       Sean Carroll | preposterousuniverse.com
       Published in 2012, 120 pages

134. Moon Trip: A Personal Account of the Apollo Program and its Science
       Elbert A. King | Lunar and Planetary Institute
       Published in 1989, 162 pages

135. An Introduction to the Theory of Rotating Relativistic Stars
       Eric Gourgoulhon | arXiv
       Published in 2010, 88 pages

136. Inflationary Cosmology and Structure Formation
       J. A. Peacock | arXiv
       Published in 1996, 77 pages

137. Atomic and Molecular Processes in Astronomy and Planetary Science
       Geoffrey A. Blake | California Institute of Technology
       Published in 2004

138. Introduction to relativistic astrophysics and cosmology through Maple
       V. L. Kalashnikov | arXiv
       Published in 2001, 124 pages

139. To See the Unseen: A History of Planetary Radar Astronomy
       Andrew J. Butrica | NASA History Division
       Published in 1996, 301 pages

140. Introduction to Early Universe Cosmology
       Robert H. Brandenberger | arXiv
       Published in 2011, 70 pages

141. Planetary Rings
       Matthew S. Tiscareno | arXiv
       Published in 2011, 82 pages

142. Planetary Theory
       Ernest Brown, Clarence Shook | Cambridge University Press
       Published in 1933, 323 pages

143. The Astrobiology Primer: An Outline of General Knowledge
       Lucas J. Mix, at al. | arXiv
       Published in 2006, 79 pages

144. Habitable Planets for Man
       Stephen H. Dole | RAND Corporation
       Published in 1964, 176 pages

145. An introductory treatise on the lunar theory
       Ernest W Brown | Cambridge University Press
       Published in 1896, 312 pages

146. Introduction to Millimeter/Sub-Millimeter Astronomy
       T. L. Wilson | arXiv
       Published in 2009, 106 pages

147. Techniques of Radio Astronomy
       T. L. Wilson | arXiv
       Published in 2011, 47 pages

148. Encyclopedia of Astrophysics
       Søren Bertil F. Dorch | Scholarpedia
       Published in 2009

149. Plasma Physics of Extreme Astrophysical Environments
       Dmitri A. Uzdensky, Shane Rightley | arXiv
       Published in 2014, 56 pages

150. Consolidated Lunar Atlas
       Gerald P. Kuiper, et al. | Lunar and Planetary Institute
       Published in 1960

151. String Cosmology
       James M. Cline | arXiv
       Published in 2007, 47 pages

152. The Geology of the Terrestrial Planets
       Michael H. Carr | NASA
       Published in 1984, 322 pages

153. Introductory Lectures on Quantum Cosmology
       J. J. Halliwell | arXiv
       Published in 1990, 107 pages

154. Galaxy systems in the optical and infrared
       A. Biviano | arXiv
       Published in 2008, 60 pages

155. Why CMB physics?
       Massimo Giovannini | arXiv
       Published in 2007, 179 pages

156. Introduction to Cosmology
       A. D. Dolgov | arXiv
       Published in 2009, 58 pages

157. The Universe in a Helium Droplet
       Grigory E. Volovik | Oxford University Press
       Published in 2003, 532 pages

158. Chondrules and their Origins
       Elbert A. King | The Lunar and Planetary Institute
       Published in 1983, 377 pages

159. A Review of the Universe: Structures, Evolutions, Observations, and Theories
        | universe-review.ca
       Published in 2009

160. The Solar Magnetic Field
       Sami Solanki, Bernd Inhester, Manfred Schussler | arXiv
       Published in 2010, 83 pages

161. Trans-Neptunian Objects: An Overview
        | Wikipedia
       Published in 2014

162. An Exposition on Inflationary Cosmology
       Scott Watson | arXiv
       Published in 2000, 93 pages

163. An Introduction to Cosmic Rays and Gamma-Ray Bursts
       A. De Rujula | arXiv
       Published in 2007, 37 pages

164. The Birth and Death of Stars
       James Schombert | University of Oregon
       Published in 2008

165. Caldwell Catalogue
        | Wikipedia
       Published in 2014

166. To a Rocky Moon: A Geologist's History of Lunar Exploration
       Don E. Wilhelms | University of Arizona Press
       Published in 1993, 524 pages

167. Radiative Processes in High Energy Astrophysics
       Gabriele Ghisellini | arXiv
       Published in 2012, 157 pages

168. Cosmology
       James Schombert | University of Oregon
       Published in 2008

169. A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology
       Licia Verde | arXiv
       Published in 2008, 52 pages

170. The Cosmic Web: Geometric Analysis
       Rien van de Weygaert, Willem Schaap | arXiv
       Published in 2007, 129 pages

171. Galaxies and the Expanding Universe
       James Schombert | University of Oregon
       Published in 2008

172. Supernovae
        | Wikipedia
       Published in 2014

173. General Astronomy
       Harold Spencer Jones | Edward Arnold and Company
       Published in 1924, 392 pages

174. Textbook on Practical Astronomy
       George Leonard Hosmer | Wiley
       Published in 1910, 252 pages

175. From Chaos to Consciousness: A Brief History of the Universe
       Mike Corwin | Bookboon
       Published in 2015, 166 pages

176. Protoplanetary Disks and Their Evolution
       Jonathan P. Williams, Lucas A. Cieza | arXiv
       Published in 2011, 65 pages

177. Multi-messenger Astronomy and Dark Matter
       Las Bergstrom | arXiv
       Published in 2012, 105 pages

178. Protostars and Planets IV
       V. Mannings, A. Boss, S. Russell | University of Arizona Press
       Published in 2000, 1422 pages

179. The Telescope
       Louis Bell | McGraw-Hill
       Published in 1922, 294 pages

180. Massive Stars and their Supernovae
       F. Thielemann, R. Hirschi, M. Liebendorfer, R. Diehl | arXiv
       Published in 2010, 81 pages

181. Cosmic Rays in Galactic and Extragalactic Magnetic Fields
       F. Aharonian, A. Bykov, E. Parizot, V. Ptuskin, A. Watson | arXiv
       Published in 2011, 43 pages

182. Hours With A Three-Inch Telescope
       William Noble | Longmans, Green & Co.
       Published in 1887, 159 pages

183. Astronomical Discovery
       Herbert Hall Turner | E. Arnold
       Published in 1904, 225 pages

184. The Virial Theorem in Stellar Astrophysics
       George W. Collins, II | Pachart Pub. House
       Published in 1978, 135 pages

185. Photographs of Nebulae and Clusters
       James Edward Keeler | University of California Publications
       Published in 1908

186. Astronomy for Amateurs
       Camille Flammarion | D. Appleton and Company
       Published in 1910

187. Observations of the High Redshift Universe
       Richard S. Ellis | arXiv
       Published in 2007, 115 pages

188. Advances in Modern Cosmology
       Adnan Ghribi | InTech
       Published in 2011, 198 pages

189. An Introduction to Celestial Mechanics
       Forest Ray Moulton | The MacMillan Company
       Published in 1914, 437 pages

190. Man's Place in the Universe
       Alfred R. Wallace | Chapman and Hall
       Published in 1904, 330 pages

191. Cosmos and Culture: Cultural Evolution in a Cosmic Context
       Steven J. Dick, Mark L. Lupisella | NASA
       Published in 2010, 612 pages

192. Big Bang Nucleosynthesis and Physics Beyond the Standard Model
       Subir Sarkar | arXiv
       Published in 1996, 156 pages

193. Spherical Astronomy
       F. Brünnow | Van Nostrand
       Published in 1865, 559 pages

194. Guide to Lunar Orbiter Photographs
       Thomas P. Hansen | NASA
       Published in 1970, 127 pages

195. Frequently Asked Questions about Calendars
       Claus Tøndering |
       Published in 2008, 65 pages

196. Lecture notes on the formation and early evolution of planetary systems
       Philip J. Armitage | arXiv
       Published in 2010, 63 pages

197. Cosmic Microwave Background Anisotropies up to Second Order
       Nicola Bartolo, Sabino Matarrese, Antonio Riotto | arXiv
       Published in 2007, 53 pages

198. Black Holes
       P.K. Townsend | arXiv
       Published in 1997, 145 pages

199. Lopsided Spiral Galaxies
       Chanda J. Jog, Francoise Combes | arXiv
       Published in 2008, 75 pages

200. Guidebook to the Geology of Barringer Meteorite Crater, Arizona
       David A. Kring | Lunar and Planetary Institute
       Published in 2007, 154 pages

201. Celestial Mechanics
       J. B. Tatum |
       Published in 2008

202. Dark Energy: Observational Evidence and Theoretical Models
       B. Novosyadlyj, V. Pelykh, Yu. Shtanov, A. Zhuk | Akademperiodyka
       Published in 2013, 380 pages

203. Observing the Sky from 30S
       Roberto Mura | Wikibooks
       Published in 2010, 86 pages

204. Vision and Voyages for Planetary Science in the Decade 2013-2022
        | National Academy of Sciences
       Published in 2011, 410 pages

205. The Birth And Death Of The Sun
       George Gamow | Dover Publications
       Published in 1940, 256 pages

206. Advanced Topics in Cosmology: A Pedagogical Introduction
       T. Padmanabhan | arXiv
       Published in 2006, 40 pages

207. Planetary Photometry
       Max Fairbairn |
       Published in 2005

208. Stellar Structure and Evolution
       Sergey V. Vorontsov | Queen Mary, University of London
       Published in 2010

209. Solar System
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       Published in 2012, 646 pages

210. The Foundations of Celestial Mechanics
       George W. Collins, II | Pachart Pub House
       Published in 2004, 145 pages

211. Hubble Space Telescope: Discoveries
        | NASA
       Published in 2012

212. An Introduction to Quantum Cosmology
       D.L. Wiltshire | arXiv
       Published in 2003, 60 pages

213. An Introduction to Astronomy
       Forest Ray Moulton | The MacMillan Company
       Published in 1916, 577 pages

214. Stellar Superfluids
       Dany Page, et al. | arXiv
       Published in 2013, 88 pages

215. Introduction to the Theory of Black Holes
       Gerard 't Hooft | Utrecht University
       Published in 2009, 49 pages

216. Introduction to Cosmology
       David H Lyth | arXiv
       Published in 1993, 53 pages

217. Traces of Catastrophe
       Bevan M French | Lunar and Planetary Institute
       Published in 1998, 120 pages

218. Sky Surveys
       S. G. Djorgovski, A.A. Mahabal, A.J. Drake, M.J. Graham, C. Donalek | arXiv
       Published in 2012, 62 pages

219. The Story of Eclipses
       George F. Chambers | S. S. McClure Co.
       Published in 1909, 208 pages

220. High Energy Astrophysics
       Jonathan Katz | The Benjamin/Cummings Publishing
       Published in 1986, 338 pages

221. Star-Gazer's Hand-Book
       Henry William Elson | Sturgis & Walton
       Published in 1910, 72 pages

222. Short History of Astronomy
       Arthur Berry | John Murray
       Published in 1898, 439 pages

223. Dwarf-Galaxy Cosmology
       Regina Schulte-Ladbeck, at al. | Hindawi Publishing
       Published in 2010

224. An Overview of the Solar System
        | Wikipedia
       Published in 2013

225. Dense Matter in Compact Stars
       Andreas Schmitt | arXiv
       Published in 2010, 146 pages

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