Questions in this quiz: Saturn and its Rings

Saturn's iconic rings — composition, gaps (Cassini Division), the ring system's likely age. Major moons (Titan, Enceladus, Mimas, Iapetus), Cassini-Huygens, and Titan's lakes.

1. What are the rings of Saturn primarily composed of? — Options: Silicate rock dust, Water ice, Methane ice, Ammonia crystals
2. Cassini's 2017 'Grand Finale' dives between Saturn and its rings allowed scientists to estimate the rings' mass, suggesting an age of roughly: — Options: 100–400 million years, 1–2 billion years, 4.5 billion years (as old as Saturn), Less than 10 million years
3. The Cassini Division — the most prominent gap in Saturn's rings — is maintained primarily by a 2:1 orbital resonance with which moon? — Options: Mimas, Enceladus, Tethys, Dione
4. Which moon of Saturn displays a striking two-tone surface — one hemisphere bright as snow, the other as dark as coal? — Options: Rhea, Iapetus, Dione, Hyperion
5. The Huygens probe, which descended through Titan's atmosphere in January 2005, was built and operated by which space agency? — Options: NASA, JAXA, ESA, Roscosmos
6. Titan's surface lakes and seas — the only stable surface liquids known outside Earth — are composed mainly of: — Options: Liquid water under an ice shell, Liquid methane and ethane, Liquid nitrogen, Hydrogen peroxide solutions
7. What surprising discovery did Cassini make about Enceladus that made it a prime target in the search for life? — Options: Active cryovolcanic plumes venting from its south pole, Liquid hydrocarbon rivers on its surface, A thick nitrogen-rich atmosphere, Magnetic field reversals every few years