The Sun.
The force that governs the motion of the solar system is primarily gravity. Gravity, which is the attractive force between objects with mass, keeps the planets in orbit around the Sun and maintains the structure and dynamics of the solar system.
Gravity, mainly.
The solar system is the smallest
The largest object in the solar system is not a planet. It is the Sun. The largest planet is Jupiter.
Please be more specific about which solar system.
The biggest object in the solar system is the sun, and the smallest is Pluto
The sun has no motion because it is at the center of our solar system
Gravity combined with the object's "sideways" (tangential to its orbit) motion. The Sun "wants" to pull the object towards it and the object "wants" to fly of into space. When these two things are balanced the object is in a stable orbit.
The sun is the largest object and the only star in the solar system.
The sun is the most massive object in our solar system.
Most object that are currently in the Solar System are such remnants.
The property that determines whether an object is part of the solar system is if it orbits the Sun. Objects within the solar system, like planets, moons, asteroids, and comets, orbit around the Sun due to its gravitational pull. Any object that does not orbit the Sun, such as stars in other solar systems or interstellar objects, would be considered outside the solar system.