Globular clusters are spherical clusters of stars that are tightly bound together by gravity. They typically contain tens of thousands to millions of stars and are among the oldest structures in the universe, dating back billions of years. These clusters are found in the halos of galaxies, including our own Milky Way, and provide valuable insights into the formation and evolution of galaxies. Studying globular clusters can help astronomers understand the processes of star formation, stellar evolution, and the dynamics of galaxies. They also serve as important laboratories for studying the properties of stars and testing theories of stellar evolution.