A person who studies stars and planets is called an astronomer. Astronomers explore celestial phenomena, focusing on the properties, behavior, and evolution of stars, planets, galaxies, and the universe as a whole. They utilize telescopes and other advanced technology to gather data and conduct research. The field of astronomy encompasses various sub-disciplines, including observational astronomy, theoretical astronomy, astrobiology, and astrophysics. Astronomers contribute to our understanding of fundamental questions about the universe's origin, structure, and future. Their findings can also inform areas such as navigation, climate science, and even the search for extraterrestrial life.