Advances in Astronomy and Astrophysics, Volume 2 brings together numerous research works on different aspects of astronomy and astrophysics. This volume is composed of six chapters and begins with a summary of observational record on twilight extensions of the Venus cusps. The next chapter deals with the common and related properties of binary stars, with emphasis on the evaluation of their cataclysmic variables. Cataclysmic variables refer to an object in one of three classes: dwarf nova, nova, or supernova. These topics are followed by discussions on the eclipse phenomena and the eclipses in the domain of the radio waves and of the artificial satellites. A chapter discusses the discovery, colors, spectra, motions, luminosities, and frequency in space of white dwarf stars. The concluding chapters examine the occurrence and capture of stray bodies in the solar system and the existence of Magellanic clouds. This book will prove useful to astronomers and astrophysicists.