Astronomy is a branch of science that studies celestial objects such as stars, planets, comets, and galaxies, as well as phenomena like supernovae, black holes, and cosmic radiation. Astronomers use telescopes, satellites, and other tools to observe and analyze these objects and phenomena, seeking to understand their composition, structure, and behavior. Astronomy also explores the origins and evolution of the universe, as well as the possibility of other forms of life beyond Earth. This field of research has made significant contributions to our understanding of the cosmos and continues to uncover new discoveries that expand our knowledge of the universe.