Bussiness directory
Astronomy
Astronomy
Astronomy, natural science that deals with the study of celestial objects, moons, planets, stars, nebulae, and galaxies, physics, chemistry, and evolution of such objectsatmosphere of earth, supernovae explosions, gamma ray bursts, and cosmic background radiation, cosmology, observational astronomy, radio astronomy, infrared astronomy, optical astronomy, ultraviolet astronomy, x-ray astronomy, gamma-ray astronomy, solar astronomy, planetary science, stellar astronomy, galactic astronomy, extragalactic astronomy