The Cassini-Huygens mission discovered the String of Pearls and Great White Spot on which planet?

• A. Jupiter
• B. Uranus
• C. Neptune
• D. Saturn

Answer: (D)

The main idea here is atmospheric phenomena on a specific planet studied by a dedicated mission. The Cassini-Huygens spacecraft was a focused study of Saturn, its rings, and its moons. Among its notable findings were the String of Pearls, a chain of storm cells circling Saturn, and the Great White Spot, a massive, planet-wide storm that periodically erupts in Saturn’s atmosphere. These features are characteristic of Saturn and were observed by Cassini-Huygens, so the planet in question is Saturn. Jupiter, Uranus, and Neptune have their own storms, but these named features are specifically tied to Saturn and the mission that explored it.