G-type stars are a category of stars that have a surface temperature between 5,300 and 6,000 degrees Celsius. They are often yellow in color and are known for their stable energy output, which allows for the formation of planets and potential life. Our Sun is a well-known example of a G-type star. These stars typically have a lifespan of about 10 billion years, spending most of their life in the main sequence phase. G-type stars fuse hydrogen into helium in their cores, which generates energy. As they age, they will eventually evolve into red giants before ending their life cycle as white dwarfs.