What would happen if the sun and your earth had the same mass?

If the Sun and Earth had the same mass, the gravitational dynamics of the solar system would drastically change. Earth would no longer be a small planet orbiting a massive star but would instead become a star itself, likely leading to complex interactions between the two bodies. The Earth-Sun system would orbit around a common center of mass, significantly altering the orbits of other planets and potentially destabilizing the entire solar system. Life on Earth, as we know it, would be impossible due to the changes in temperature, light, and gravitational forces.