G dwarfs are a type of star classified as G-type main-sequence stars. They are characterized by their yellowish color and moderate temperature, typically ranging from 5,300 to 6,000 degrees Celsius. The most well-known example of a G dwarf is our own Sun, which provides the necessary light and heat for life on Earth. These stars are generally stable and can have lifespans of around 10 billion years. G dwarfs fuse hydrogen into helium in their cores, a process that generates energy. They are often surrounded by planetary systems, making them important for the study of exoplanets and the potential for extraterrestrial life.