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, Infrared
Sources, Gaseous Nebulae, Planetary Nebulae.- Radio Sources, Quasars,
Pulsars, Extreme UV, X-Ray, Gamma-Ray Sources, Cosmic Radiation.- Stellar
Systems.
