TerraGenesis Wiki
TerraGenesis Wiki

Rhea map with a small amount of water

The second-largest of Saturn's moons, Rhea is also the second-smallest body in the solar system to have reached hydrostatic equilibrium, which among other things means that it has a differentiated core.

Though often second-place, Rhea does have one potential claim to being absolutely unique in the solar system: several readings from the Cassini spacecraft in 2005 have indicated that Rhea might have its own system of rings, which would make it the only known moon to do so. Only future exploration, and the first-hand reports of your colonists, will be able to confirm this romantic idea.


Rhea is the second largest moon of the Saturnian system. It has rings, which makes it the first rings of a moon in the solar system.


Although it should not be hard, Rhea does pose the same water issue as other Moons of Saturn, etc like Dione, Tethys, Mars, Venus, Ganymede etc.. It is another ice world, but it is larger than the others. With over a million centimeters of ice, it will take a little longer to get rid of it, like on Iapetus.


  • Rhea is said to have a liquid water ocean beneath is surface.
  • Rhea has a strange shape not like any other moon.
  • Rhea has a thin atmosphere, made of CO2 and oxygen.
  • Rhea has a ring system, the first rings of a moon to be discovered.

    An artist's impression of Rhea's rings

Terrestrial Planets Mercury · Venus · Earth · Moon (Luna) · Mars
Moons of Gas Giants Moons of JupiterMoons of SaturnMoons of UranusMoons of Neptune
Moons of Jupiter Io · Europa · Ganymede · Callisto
Moons of Saturn Tethys · Dione · Rhea · Titan · Iapetus
Moons of Uranus Miranda · Ariel · Umbriel · Titania · Oberon
Moons of Neptune Triton
Dwarf Planets Ceres · Pluto · Charon · Makemake · Eris · Sedna
TRAPPIST-1 Damu · Aja · Huanca · Ruaumoko · Asintmah · Ostara · Aranyani
Fictional Planets Bacchus · Pontus · Lethe · Ragnarok · Boreas
Historical Earths Vaalbara · Rodinia · Cambria · Cretacea · Dania · Chibania · Ultima
Random Planets