Which force is responsible for holding the solar system together?

The gravitational force is the universal force of attraction that acts between objects.

The equation for universal gravitation is given as: 
$\mathrm{F} = \frac{{\mathrm{GM}}_1{\mathrm{M}}_2}{{\mathrm{R}}^2}$

Here, G is the gravitational constant;  M₁ and  M₂ are the masses of the objects; R is a separation between the objects.

The solar system's gravitational force is responsible for holding the solar system together.
The solar system is gravitationally bound by the sun, which is located at its centre.