G-Type refers to a classification of stars that fall within the spectral class G. These stars are characterized by their yellowish color and surface temperatures ranging from about 5,300 to 6,000 degrees Celsius. The most well-known example of a G-Type star is our own Sun, which plays a crucial role in supporting life on Earth. G-Type stars typically have a lifespan of around 10 billion years and undergo nuclear fusion, converting hydrogen into helium in their cores. They are often found in the main sequence phase of stellar evolution, where they spend the majority of their lives. Other examples of G-Type stars include Alpha Centauri A and Tau Ceti.