G-Type stars are a category of stars that have a surface temperature between 5,300 and 6,000 degrees Celsius. They are characterized by their yellowish color and are part of the Hertzsprung-Russell diagram, which classifies stars based on their luminosity and temperature. The most well-known G-Type star is the Sun, which provides the necessary heat and light for life on Earth. These stars typically have a lifespan of about 10 billion years and undergo nuclear fusion, converting hydrogen into helium in their cores. G-Type stars can host planetary systems, and many exoplanets have been discovered orbiting them, making them important targets in the search for extraterrestrial life.