For 10 points, name this planet orbited by moons like Enceladus, Phoebe, and Titan, with the Encke gap and Cassini Division in its rings.
As imaged by the Hubble telescope, a huge storm recurs in a band near its equator in the Northern Hemisphere every 30 years, and it is unique in having a warm polar vortex. One of its moons has sufficient geyser activity to eject water vapor onto this planet and slow down the rotation of plasma in its atmosphere, and it may produce some of its heat via friction as helium atoms escape from its core. One of its moons is the only one in the solar system with a dense atmosphere, and Pandora and Prometheus are among its shepherd satellites. For 10 points, name this planet orbited by moons like Enceladus, Phoebe, and Titan, with the Encke gap and Cassini Division in its rings.
As imaged by the Hubble telescope, a huge storm recurs in a band near its equator in the Northern Hemisphere every 30 years, and it is unique in having a warm polar vortex.
Saturn