How can astronomers determine the mass of the sun and what methods do they use to make this calculation accurately?

Astronomers determine the mass of the sun by observing the orbits of planets and other celestial bodies around it. They use Newton's law of universal gravitation and Kepler's laws of planetary motion to calculate the mass of the sun accurately. By measuring the orbital velocities and distances of objects in the solar system, astronomers can infer the mass of the sun through mathematical calculations.