The term for a person who studies stars and planets is "astronomer." Astronomers observe celestial bodies, such as stars, planets, comets, and galaxies, using various tools, including telescopes and satellites. They analyze data to understand the universe's structure, origin, and evolution. Astronomers can specialize in subfields, such as planetary science, cosmology, or astrophysics. Their work can contribute to fundamental discoveries about the universe, influence space exploration efforts, and provide insights into phenomena that affect Earth, such as solar activity. Astronomy has been a significant aspect of human curiosity and scientific inquiry for millennia.