Abbreviations.- Periodicals, Proceedings, Books, Activities.- Applied Mathematics, Physics.- Astronomical Instruments and Techniques.- Positional Astronomy. Celestial Mechanics.- Space Research.- Theoretical Astrophysics.- Sun.- Earth.- Planetary System.- Stars.- Interstellar Matter, Gaseous Nebulae, Planetary Nebulae.- Radio Sources, Quasars, Pulsars, Infrared, X-Ray, Gamma-Ray Sources, Cosmic Radiation.- Stellar Systems.
