What is the name of the star at the center of our solar system? The Sun is the star at the center of our solar system.
The Sun is a nearly spherical ball of extremely hot plasma whose gravity holds the planets, dwarf planets, moons, asteroids, and comets in their orbits. It contains more than 99% of the Solar System’s total mass, making it the dominant object in our planetary neighborhood. Earth orbits the Sun at an average distance of about 150 million kilometers, a distance defined as one astronomical unit.
The Sun produces energy through nuclear fusion in its core. There, hydrogen nuclei combine to form helium, releasing energy that eventually reaches the surface and radiates into space as light and other electromagnetic radiation. That energy powers Earth’s climate and nearly all surface ecosystems.
The Sun is classified as a G-type main-sequence star, often called a G dwarf, and is about 4.6 billion years old. It is not the same as Sirius or Proxima Centauri: those are separate stars beyond our Solar System. The Sun appears much brighter only because it is vastly closer to Earth than any other star.