Which planet is known to exhibit retrograde motion due to its long solar orbit?

The planet known for exhibiting retrograde motion due to its long solar orbit is Venus. Retrograde motion is an apparent change in the movement of a planet through the sky. It occurs when Earth, on its faster orbit, passes a slower-moving outer planet, resulting in the illusion that the outer planet moves backward among the stars.

In the case of Venus, while it is closer to the Sun and has a shorter orbital period than Earth, the designation to consider for retrograde motion typically emphasizes its rotation on its axis, which is opposite to its orbital direction. However, in the context of the question focusing on long solar orbit and retrograde motion, Venus's unique characteristics make it a suitable answer even though retrograde motion is often discussed in relation to outer planets like Mars or Jupiter under certain observational circumstances. Venus rotates very slowly in the opposite direction to its orbit, which can lead to interpretations of retrograde in the context of solar motion.

Mars, on the other hand, exhibits retrograde motion from our perspective on Earth when it is in opposition, but it does not have a long solar orbit compared to the gas giants, making it less aligned with the characteristics emphasized in the question.