Also given the name Saturn V, it is the fifth moon that moves outward from the planet. Iapetus is an oddly-coloured and shaped moon of Saturn.

The moon got its name from the Greek mythological character Rhea who is the revered mother of all the gods. Titan, however, has a very thick … Among all the moons of the solar system, it's the ninth-largest, and if it weren't orbiting a larger planet, it might be considered a dwarf planet.

For a listing of all moons, see Moons of the Planets. Rhea is an expert curated resource of biochemical reactions designed for the annotation of enzymes and genome-scale metabolic networks and models. Giovanni Cassini discovered Rhea on Dec. 23, 1672.

Tethys, Dione, and Rhea move in different orbits around Saturn and at different speeds, and on occasion form a right triangle (Figure). All three of these moons are quite small compared to Earth's moon (mass 7.36 times 10^22 kg).

Titan has a thick mostly nitrogen atmosphere (with some methane) and an atmospheric pressure of 1.6 bars (60 percent greater than the Earth's). It was discovered in 1672 by Giovanni Cassini.Rhea is an icy body with a density of 1.33 gm/cm 3.The low density indicates that it is composed of a rocky core taking up less than one-third of the moon's mass, with the rest composed of water-ice. Rhea is composed primarily of water ice with rock making up less than 1/3 of its mass. Rhea is an icy body with a density of about 1,240 kg/m 3. This cold, airless and heavily scarred body is very similar to sister moons Dione and Rhea except that Tethys is not as heavily cratered as the other two. Like Jupiter's moon Callisto, Rhea's craters lack the high surface features found in craters on Mercury and the Moon. It is larger than the planets Mercury and Pluto.

Calculate its average density. Rhea uses the ChEBI (Chemical Entities of Biological Interest) ontology of small molecules to precisely describe reactions participants and … Universe Today podcasts with Fraser Cain The Guide to Space is a series of space and astronomy poddcasts by Fraser Cain, publisher of Universe Today Podcast Subscription Menu Rhea, one of Saturn’s moons, has a radius of 811 km and an acceleration due to gravity of 0.184 m/s2 at its surface. Their masses are 6.2 times 10^20 kg for Tethys, 1.1 times 10^21 kg for Dione, and 2.3 times 10^21 kg for Rhea. It's made mostly of ice, with a small amount of rocky material inside. Rhea is a small, cold, airless body that … Facts about Rhea Moon for Kids: Giovanni Cassini discovered two moons around Saturn and then discovered Rhea as the third moon and then a fourth moon. Like Dione, Rhea's orbit around Saturn is synchronous, meaning that it always keeps the same face toward Saturn. Rhea moon is the second-largest Saturnian satellite (only Titan is larger). Only Rhea and Titan, the largest Saturnian moon, have enough mass to hold on to an atmosphere with their gravity.

Mass: 1.3455 x 10 23 kg: Biggest moon of Saturn and second largest moon in Solar System (after Jupiter's Ganymede). Cassini view of Rhea's anti-Saturnian hemisphere, showing the moon's two largest impact basins (Mamaldi above and left of center, and adjacent Tirawa to its upper right). The four moons of Saturn that Cassini discovered were named “Stars of Louis” (Tethys, Lapetus, Rhea, and Dione) to honor the French king. Its irregular shape is 331 miles (533 kilometers) in mean radius, with dimensions 669 x 657 x 654 miles (1076.8 x 1057.4 x 1052.6 kilometers).

At highest resolution, several long linear features are visible: halfway down from center is Harahvaiti Fossa, while near the limb left of the bottom is Koykamou Catena. A later flyby got much closer over the north pole of Rhea and managed to use the mass spectrometer to confirm that the thin atmosphere had both oxygen and carbon dioxide. Tethys is Saturn's fifth largest moon. Cassini color image of Rhea, showing the wispy trailing hemisphere. In addition to a very thin atmosphere (exosphere) Rhea may also have a tenuous ring system, although this has not been confirmed.
It is composed of 75% water ice and 25% rocky material, and has a thin oxygen atmosphere.
It's surface has ice cliffs and dark areas made of complex organic compounds. It is the third-largest moon in the system, and was discovered in 1671 by the astronomer Giovanni Domenico Cassini.

Rhea has a diameter of 1,528 km (949 miles) and revolves around Saturn in a prograde, nearly circular orbit at a mean distance of 527,040 km (327,490 miles) and with an orbital period of about 4.52 Earth days. This low density indicates that it has a rocky core taking up less than one-third of the moon's mass with the rest composed of water-ice.

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