For 10 points, name this second-largest planet in the solar system that is notable for its ring system.
One prominent meteorological phenomenon in this planet's northern hemisphere was observed in 1933 by Will Hay, and two moons of this planet which features the Great White Spot are the only co-orbital satellites in the solar system. The first spacecraft to observe this planet was Pioneer 11, and although it is the least dense planet in the solar system, one moon of this planet is known for its dense atmosphere. The Huygens probe landed on this planet's largest moon Titan. For 10 points, name this second-largest planet in the solar system that is notable for its ring system.
One prominent meteorological phenomenon in this planet's northern hemisphere was observed in 1933 by Will Hay, and two moons of this planet which features the Great White Spot are the only co-orbital satellites in the solar system.
Saturn