A "G dwarf" is a type of star that falls within the spectral class G. These stars are characterized by their yellowish color and moderate temperature, typically ranging from about 5,300 to 6,000 degrees Celsius. The most well-known example of a G dwarf is our own Sun, which is classified as a G2V star. G dwarfs are often found in the main sequence phase of stellar evolution, where they spend the majority of their lifetimes fusing hydrogen into helium in their cores. G dwarfs are important in the study of stellar evolution and the formation of planetary systems. They can host planets in their habitable zones, where conditions may be suitable for life. The presence of G dwarfs in the universe provides valuable insights into the chemical composition and dynamics of galaxies, as they contribute to the enrichment of interstellar matter through processes like supernovae at the end of their life cycles.