Solar System : Which celestial body is the largest in our Solar System?

The Sun is the central star in the Solar System and accounts for more than 99% of the total mass. Its gravitational pull governs the orbits of all planets, asteroids, comets, and other objects. The Sun generates energy through nuclear fusion of hydrogen atoms into helium, emitting light, heat, and solar wind which influence conditions throughout the solar system. It is nearly 1.4 million kilometers in diameter, making it overwhelmingly larger than any planet.