Astronomy and Astrophysics Abstracts, which appears in semi-annual volumes, is devoted to the re cording, summarizing and indexing of astronomical publications throughout the world. It aims to pre sent a comprehensive documentation of literature in all fields of astronomy and astrophysics. Every effort will be made to ensure that the average time interval between the date of receipt of the original literature and publication of the abstracts will not exceed eight months. This time interval is near to that achieved by monthly issued abstracting journals, compared to which our system of accumulating abstracts for about six months offers the advantage of greater convenience for the user. Volume 2 contains literature published in 1969 and received before March 15, 1970; some older lite rature which was received late and which is not recorded in Volume 1 is also included. The authors of papers who have sent us abstracts on request have effectively contributed to the suc cess of our service. We should like to express our gratitude to them. We acknowledge with thanks con tributions to this volume by Dr. J. Bou~a, who surveyed journals and publications in Czech language and supplied us with abstracts in English, by Dr. B. Onderlicka, Brno, for providing English ab stracts of Russian papers, and by the Commonwealth Scientific and Industrial Research Organization (C.S.I.R.O.), Sydney, for providing titles and abstracts of papers on radio astronomy.
Abbreviations.- Periodicals, Proceedings, Books, Activities.- 001
Periodicals.- 002 Bibliographical Publications.- 003 Books.- 004 History of
Astronomy, Chronology.- 005 Biography.- 006 Personal Notes.- 007 Obituaries.-
008 Observatories, Institutes.- 009 Notes on Observatories, Planetaria, and
Exhibitions.- 010 Societies, Associations, Organizations.- 011 Reports on
Colloquia, Congresses, Meetings, Symposia, and Expeditions.- 012 Proceedings
of Colloquia, Congresses, Meetings, and Symposia.- 013 Reports on Astronomy
in Various Countries and Particular Fields, International Cooperation.- 014
Teaching in Astronomy.- 015 Miscellanea.- Applied Mathematics, Physics.- 021
Mathematics, Computing, Machine Programs.- 022 Physical Papers Related to
Astronomy and Astrophysics.- Instruments and Astronomical Techniques.- 031
Optics, Methods of Observation and Reduction.- 032 Astronomical Instruments.-
033 Radio Telescopes and Equipment.- 034 Astronomical Accessories.- 035
Clocks and Frequency Standards.- 036 Photographic Auxiliaries.- Positional
Astronomy. Celestial Mechanics.- 041 Positional Astronomy, Star Catalogues
and Atlases.- 042 Celestial Mechanics.- 043 Astronomical Constants.- 044
Time, Rotation of the Earth.- 045 Latitude Determination, Polar Motion.- 046
Geodetic Astronomy, Navigation.- 047 Ephemerides, Almanacs, Calendars.- Space
Research.- 051 Extraterrestric Research, Spaceflight Related to Astronomy.-
052 Astrodynamics and Navigation of Space Vehicles.- 053 Lunar and Planetary
Probes and Satellites.- 054 Artificial Earth Satellites.- 055 Observations of
Earth Satellites, Lunar and Planetary Probes.- Theoretical Astrophysics.- 061
General Theoretical Problems of Astrophysics, Gravitational Instability,
Neutrino Astronomy, X Ray- and Gamma Ray-Astronomy, Frequency and Origin of
Elements, etc.- 062 Magneto-Hydrodynamics, Plasma.- 063 Radiative Transfer.-
064 Stellar Atmospheres, Stellar Envelopes.- 065 Stellar Structure, Stellar
Evolution, Stellar Nucleosynthesis.- 066 Relativistic Astrophysics (without
Cosmology), Background Radiation, Gravitation Theory.- Sun.- 071 Solar
Photosphere, Spectrum.- 072 Sunspots, Faculae, Solar Activity.- 073 Solar
Chromosphere, Flares, Prominences.- 074 Solar Corona, Solar Wind.- 075 Solar
Patrol.- 076 Solar UV, X Rays, Gamma Radiation.- 077 Solar Radio Radiation.-
078 Solar Cosmic Radiation.- 079 Solar Eclipses.- 080 Solar Figure, Internal
Constitution, Rotation, Miscellanea.- Earth.- 081 Figure, Composition, and
Gravity of the Earth.- 082 The Earth's Atmosphere including Refraction,
Scintillation, Extinction, Airglow, Site Testing.- 083 Ionosphere.- 084
Aurorae, Geomagnetic Field, Radiation Belts.- 085 Solar-Terrestrial
Relations.- Planetary System.- 091 Physics of the Planetary System (Planetary
Atmospheres, Figure, Interior, Magnetic Fields, Rotation, etc).- 092
Mercury.- 093 Venus.- 094 Moon.- 095 Lunar Eclipses.- 096 Lunar
Occultations.- 097 Mars.- 098 Minor Planets.- 099 Jupiter.- 100 Saturn.- 101
Uranus, Neptune, Pluto, Transplutonian Planet.- 102 Comets.- 103 Comets:
Listed Objects.- 104 Meteors, Meteor Streams.- 105 Meteorites, Meteorite
Craters.- 106 Interplanetary Matter, Interplanetary Magnetic Field, Zodiacal
Light.- 107 Cosmogony of the Planetary System.- Stars.- 111 Stellar
Parallaxes.- 112 Proper Motions, Radial Velocities, Space Motions.- 113
Stellar Magnitudes, Colors, Photometry.- 114 Stellar Spectra, Temperatures,
Spectroscopy.- 115 Stellar Luminosities, Masses, Diameters, HR-Diagrams and
Others.- 116 Stellar Magnetic Field, Figure, Rotation.- 117 Binary and
Multiple Stars, Theory.- 118 Visual Binaries.- 119 Spectroscopic Binaries.-
120 Variable Stars: Catalogues, Ephemerides, Miscellanea.- 121 Eclipsing
Variables.- 122 Physical Variables, Flare Stars, Pulsation Theory..- 123
Variable Stars: Lists of Observations, Individual Observations.- 124 Novae.-
125 Supernovae, Supernova Remnants.- 126 Low-luminosity Stars, Subdwarfs,
White Dwarfs.- Interstellar Matter, Gaseous Nebulae, Planetary Nebulae.- 131
Interstellar Space, Interstellar Matter, Polarization of Starlight.- 132
Emission Nebulae, Reflection Nebulae.- 133 Planetary Nebulae.- 134 Crab
Nebula.- Radio Sources, Quasars, Pulsars, X Ray-, Gamma Ray-Sources, Cosmic
Radiation.- 141 Radio Sources, Quasars, Pulsars.- 142 X Ray-, Gamma
Ray-Sources.- 143 Cosmic Radiation.- Stellar Systems.- 151 Kinematics and
Dynamics of Stellar Systems.- 152 Stellar Associations.- 153 Galactic
Clusters.- 154 Globular Clusters.- 155 Structure and Evolution of the
Galaxy.- 156 Galactic Magnetic Field.- 157 Galactic Radio Radiation.- 158
Single and Multiple Galaxies.- 159 Magellanic Clouds.- 160 Clusters of
Galaxies.- 161 Intergalactic Matter.- 162 Structure and Evolution of the
Universe, Cosmology.- Author Index.
