Astronomy is a natural science which is the study of celestial objects (such as stars, galaxies, planets, moons, asteroids, comets and nebulae), the physics, chemistry and evolution of such objects and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts and cosmic microwave background radiation. A related but distinct subject, physical cosmology, is concerned with studying the universe as a whole. The human inquisitiveness is so wide that it would take centuries to explore the facts of the world. However, this series tries to achieve the impossible by presenting you almost all you ever wanted to know. The reader can surf through the collection and gather all information about famed personalities, countries, languages, professions, computers, health and fitness, sports, quotations, world, traveling destinations, musical instruments, hobbies, spiritual teachings, health disorders, history, etc