A G-type main-sequence star, often referred to as a G dwarf star, is a type of star that falls within the spectral class G. These stars have surface temperatures ranging from about 5,300 to 6,000 degrees Celsius. They are characterized by their yellowish color and are typically stable, burning hydrogen in their cores through nuclear fusion. Our own Sun is a well-known example of a G-type main-sequence star. G-type stars are important in the study of stellar evolution and the potential for habitable zones around them. They usually have a lifespan of around 10 billion years, allowing ample time for the development of life on orbiting planets. Their relatively stable energy output makes them favorable candidates for hosting exoplanets that may support life.