As seen by an observer on Saturn (or one of its moons),which of the following planets can NEVER pass through inferior conjunction?

Question

Quizplus · Accepted Answer

Inferior conjunction occurs when the inferior planet (a planet inside the orbit of Earth) passes between the Sun and Earth. Since Saturn (and its moons) are outside the orbit of Earth, they cannot observe an inferior conjunction involving Earth, Venus, or Mercury. However, for a planet to pass through inferior conjunction when observed from Saturn, it would have to be closer to the Sun than Saturn at some point in its orbit. Therefore, the only planet that can never pass through inferior conjunction as seen from Saturn is Neptune, which is located much farther from the Sun than Saturn. Jupiter, on the other hand, can pass through inferior conjunction when it is on the opposite side of the Sun as seen from Saturn.

As Seen by an Observer on Saturn (Or One of Its