* The Outer Solar System: The planets that are further from the Sun than Earth are Mars, Jupiter, Saturn, Uranus, and Neptune.

* Distance: 2 billion miles is a huge distance, but it's still within the range of our outer solar system planets.

Here's the breakdown:

* Mars: It's about 142 million miles from the Sun at its farthest point.

* Jupiter: It's about 484 million miles from the Sun at its farthest point.

* Saturn: It's about 900 million miles from the Sun at its farthest point.

* Uranus: It's about 1.8 billion miles from the Sun at its farthest point.

* Neptune: It's about 2.8 billion miles from the Sun at its farthest point.

The answer: Neptune is more than 2 billion miles from the Sun at its farthest point in its orbit.