Proper noun
outer Solar System
The area of the Solar System that comprises certain objects that are relatively far from the Sun, including Jupiter, Saturn, Uranus and Neptune, while not including the other planets.
We find a set of data that strongly implies the presence of complex organic molecules in the outer solar system. Carl Sagan
It is, I think, very interesting that we have a world in the outer solar system that is loaded with the stuff of life. Carl Sagan