Globular clusters are tightly packed groups of stars that orbit the core of galaxies. They typically contain thousands to millions of stars, all bound together by gravity. These clusters are often spherical in shape and can be found in the halo of galaxies, including our own Milky Way. These star clusters are among the oldest objects in the universe, with ages ranging from 10 to 13 billion years. They provide valuable insights into the early formation of galaxies and the evolution of stars. Notable examples of globular clusters include M13 in the Hercules constellation and 47 Tucanae in the Tucana constellation.