The largest source of gravity in the solar system is the Sun.

Here's why:

* Mass: The Sun accounts for over 99.8% of the total mass of the entire solar system.

* Gravity and Mass: Gravity is directly proportional to mass. The more massive an object is, the stronger its gravitational pull.

While Jupiter is the largest planet by diameter and mass, it's still significantly less massive than the Sun. The Sun's immense mass is the dominant force that holds the entire solar system together.