Astronomy is the scientific study of celestial objects, space, and the universe as a whole. It encompasses the observation and analysis of phenomena such as stars, planets, galaxies, and cosmic events. Through the use of telescopes and other instruments, astronomers seek to understand the origins, evolution, and behavior of these celestial entities. The field of astronomy has a rich history, dating back to ancient civilizations that gazed at the night sky. Today, it combines physics, mathematics, and technology to explore the vastness of space. Notable figures in astronomy include Galileo Galilei and Carl Sagan, who have significantly contributed to our understanding of the universe.