While the heliopause is an important boundary, it doesn't mark the end of the solar system. Here's why:

* The heliopause is where the solar wind (stream of particles from the Sun) meets the interstellar medium (the gas and dust between stars). It's a region where the Sun's influence begins to weaken.

* The solar system extends far beyond the heliopause. For example, the Oort cloud, a vast sphere of icy objects believed to be the source of some comets, lies much further out. It's estimated to be tens of thousands of times further from the Sun than Earth.

In short, the heliopause is a significant boundary, but it doesn't define the outer limit of our solar system.