Report for year ending 1980 December 31

Research items are reported under the headings: solar system studies; pulsating variables in the Galaxy and the Magellanic Clouds; Peculiar Stars in the Galaxy and the Magellanic Clouds; ground-based observations of celestial X-ray sources; globular clusters; Galactic structure problems; interacting binary stars; galaxies; flare stars and sub-luminous stars; the provision of photometric standards for astronomy; parallax determinations and Earth satellite observations. A list of publications is appended. (U.K.)