The Sun is a star that is the center of our solar system. It is a huge, hot ball of plasma that gives off light and heat. What is the Sun made of? The Sun is made of plasma, which is a state of matter similar to gas but with most of the particles ionized. The Sun is mostly made of hydrogen and helium. What does the Sun do? The Sun's gravity holds the solar system together. The Sun's energy powers life on Earth. The Sun's energy is used to generate solar power. How big is the Sun? The Sun is about 100 times wider than Earth. The Sun is about 333,000 times more massive than Earth. The Sun contains about 99.8% of the mass in the solar system. How old is the Sun? The Sun is about 4.6 billion years old. What is the Sun's future? The Sun will eventually swell into a red giant, shed its outer layers, and collapse into a white dwarf. The white dwarf will eventually fade into a black dwarf.