Titan:
* Nitrogen (N2): The most abundant gas, making up about 95% of the atmosphere.
* Methane (CH4): The second most abundant gas, accounting for about 5% of the atmosphere.
* Other trace gases: These include ethane (C2H6), hydrogen (H2), argon (Ar), and a variety of organic molecules.
Enceladus:
* Water vapor (H2O): This is the dominant gas detected in Enceladus's plume, which erupts from its south polar region.
* Other trace gases: These include carbon dioxide (CO2), methane (CH4), ammonia (NH3), and possibly hydrogen (H2).
Other Moons:
* Rhea: A very thin atmosphere composed primarily of oxygen (O2), likely produced by the breakdown of water ice by radiation.
* Dione: A very thin atmosphere of oxygen (O2), similar to Rhea.
* Iapetus: A very thin atmosphere of carbon dioxide (CO2), likely produced by the breakdown of carbon dioxide ice by radiation.
It's important to note that the atmospheres of Saturn's moons are incredibly thin compared to Earth's. They are often called "exospheres" because they are so weakly bound to the moon's gravity.
Ongoing Research:
Scientists are still actively studying the atmospheres of Saturn's moons using spacecraft like Cassini. New discoveries about the composition and evolution of these atmospheres are being made all the time.
