Rhea

Rhea is the second largest moon of Saturn and the ninth-largest moon in the system, she is the second smallest body who obtains hydrostatic equilibrium, after dwarf planet Ceres. She was discovered in 1672.

she is really shy, and has the same personality as Saturn and Neptune, she got really sad about how Dione took off her arms when she was young, she also does not like crime and horror fiction due to the fact that she doesn't like blood.

Physical Info
Rhea is an icy body made out of 25% rock and 75% ice, before the Cassini-Huygens mission took place she was assumed to have a rocky core, but in a paper published in 2007 indicated that her moment of inertia coefficient was 0.4, she has an almost homogeneous interior.

her triaxial shape is consistent in hydrostatic equilibrium, she would be capable of sustaining a liquid water ocean underneath her skin due to heating caused by radioactive decay.

Features
her features resemble those of Dione, with leading and trailing hemispheres, her average temperature she spends is 99 degrees K (-174 degrees Celsius, and -281 degrees Fahrenheit).

she has a heavily cratered surface, with the exceptions of a few Dione-type chasmata of fractures on the trailing hemisphere and has a very faint line of material on her equator, she has two very large impact craters on her "Anti-Cronian" side (the side facing away from Saturn), their names are Tirawa and Inktomi, Tirawa is roughly comparable to that of the Odysseus basin on Tethys, and Inktomi (also called "The Splat"), is one of the youngest craters on Saturn's inner moons.

Her surface can be divided into two geologically different areas based on crater density, the first part contains craters larger than 40 kilometers, and the second areas has craters under that size, this suggests that a major resurfacing event happened to her during her birth, the leading hemisphere is heavily cratered and uniformly bright like on Jupiter's moon Callisto, her craters lack the high relief features Moon and Mercury have, the cratered plains are four billion years old on average, the trailing hemisphere has a network of bright swaths on a dark background with few visible craters. these bright areas might be material ejected by ice volcanoes early in her lifetime when her interior was still liquid, Dione however has an even darker trailing hemisphere and similar but more prominent bright streaks.

Birth
Rhea, like her other friends, we're born in a co-accretion disk, similar to how the planets are born

there is a model where Titan formed in a series of giant impacts, Rhea and Iapetus where born from these impacts

Atmosphere
in 2010, NASA announced the discovery of a tenuous atmosphere, an exosphere, it consists of carbon dioxide and oxygen of roughly 5 to 2.

Possible ring system
in 2008, NASA announced that she could have a ring system, marking the first discovery of rings around a moon, her rings' existence was inferred by observed changes in the flow of electrons trapped by Saturn's magnetic field as Cassini passed by Rhea, dust and debris could extend out to her Hill sphere, but no evidence of ring material was found orbiting her

solid bodies can stably orbit around her, they won't be stable around Dione and Tethys because they so much closer to Saturn and have smaller Hill spheres, or on Titan because of drag from his dense atmosphere

In fiction

 * in the movie Independence Day: Resurgence, humanity builds a defense outpost on her
 * in the Red Rising book series, 60 years prior to the events of the books, she rebelled against the society and as a lesson to the other moons, she got "glassed" (the surface bombarded until she got so hot that she formed a layer of glass-like rock)

Named after
Rhea is named after many things, here is a list

Mythology

 * Rhea, a titan
 * Rhea Silvia, the mother of twins Romulus and Remus
 * Rhea, mother of Avantinus
 * Rhea, or Riadh, a Celtic mythological hero

Science and Technology

 * Rhea, an asteroid
 * Rhea, a species of birds
 * Green ramies (also called Rhea), a bast fibre plant
 * Rhea, a pipeline

places on Earth

 * Rhea County, a county in Tennessee
 * Rhea Springs, Tennessee, an old defunct down
 * Rhea, an island in France

Music

 * Rhea, a 1908 opera
 * Rhea, a 1988 composition of 12 saxophones
 * "Rhea", a song on the 1997 album Did Tomorrow Come..., by Polish heavy metal band Sirrah
 * Rheia, a 2016 album by Belgian band Oathbreaker

Ships

 * USS Rhea (AMc-58) a coastal minesweeper launched in 1941
 * USS Rhea (AMS-52) a minesweeper launched in 1942

People with given names

 * Rhea Bailey, an English actress
 * Rhea Boyd, an American paediatrican
 * Rhea Carmi, an Israeli artist
 * Rhea Durham, an American model
 * Rhea Kapoor, an Indian producer
 * Rhea May Taleb, a Lebanese footballer
 * Rhea Perlman, an American actress
 * Rhea Pillai, an Indian model
 * Rhea Ripley, an Australian professional wrestler
 * Rhea Santos, a Filipina journalist, host, and newscaster
 * Rhea Seehorn, and American actress
 * Margaret Rhea Seddon, an American astronaut
 * Rhea Tregebov, a Canadian poet, novelist, and writer

People with surnames

 * Caroline Rhea, a stand up comedian, television actress, and host
 * Karen Rhea, an American mathematics educator
 * Timothy Rhea, an American conductor, and Director of Bands at Texas A&M University
 * Russ Rhea, an American journalist

Fictional characters

 * Rhea of the Coos, a character in Stephen King's Dark Tower novels
 * Rhea Jones, a DC comics character
 * Rhea, a character in the TV show Supergirl
 * Rhea, a character in Fire Emblem: Three Houses

Zoology

 * Rhea, a flightless South American bird

Other

 * Rhea County Courthouse, a historic building in Rhea County, Tennessee
 * Rhea-McEntire House, a historic mansion in the US state of Alabama

Trivia

 * Rhea's probable ring system indicated that she has children (subsatellites, or moons of a moon)
 * the same thing could happen to Iapetus, which explains her weird equatorial ridge