Rhea (moon) - Wikipedia
Rhea (/ ˈ r iː. ə /) is the second-largest moon of Saturn and the ninth-largest moon in the Solar System, with a surface area that is comparable to the area of Australia. It is the smallest body in the Solar System for which precise measurements have confirmed a shape consistent with hydrostatic equilibrium .
Rhea - NASA Science
Rhea is a small, cold, airless body that is very similar to sister moons Dione and Tethys. As with the other two moons, Rhea is tidally locked in phase with its parent — one side always faces toward Saturn — as it completes its 4.5-Earth-day orbit around the planet.
Rhea: A guide to Saturn's 'rocky snowball' moon | Space
2024年1月22日 · Rhea is the second-largest moon of the gas giant planet Saturn. It was discovered by Italian astronomer Giovanni Cassini on Dec. 23, 1672. With a radius of 475 miles (764 kilometers), Rhea...
Rhea | 2nd Largest Moon of Saturn | Britannica
Rhea, major regular moon of Saturn and the planet’s second largest, after Titan. It was discovered in 1672 by the Italian-born French astronomer Gian Domenico Cassini and named for a Titan of Greek mythology. Rhea has a diameter of 1,528 km (949 miles) and revolves around Saturn in …
Regarding Rhea - Science@NASA
2016年8月1日 · Rhea (949 miles or 1,527 kilometers across) is Saturn's second largest moon after Titan. Its ancient surface is one of the most heavily cratered of all of Saturn's moons. Subtle albedo variations across the disk of Rhea hint at past geologic activity.
Rhea: Saturn's Second Largest Moon - NASA
2008年3月23日 · Rhea is the second largest moon of Saturn, behind Titan, and the largest without an atmosphere. It is composed mostly of water ice, but has a small rocky core. Rhea's rotation and orbit are locked together (just like Earth's Moon) so that one side always faces Saturn.
Rhea Moon: Saturn's Second-Largest Satellite - ThoughtCo
2019年7月3日 · Rhea moon is the second-largest Saturnian satellite (only Titan is larger). It's made mostly of ice, with a small amount of rocky material inside. Among all the moons of the solar system, it's the ninth-largest, and if it weren't orbiting a …
Rhea Moon: The Second Largest Moon of Saturn - The Planets
Rhea is an outer large moon of Saturn, lying beyond the E ring. It was discovered in the 17th century. It was named after a Titaness in Greek myth and is also known as Saturn V. We use the adjective Rhean for this moon. Rhea is more than 1,500 km across, making it Saturn’s second-largest moon after Titan.
The moon Rhea - History, structure, surface, atmosphere, ring …
Rhea, second largest of Saturn’s natural satellites or moons, was discovered in the year 1672 by Giovanni Domenico Cassini, an Italian-French astronomer. It is also the ninth biggest moon in the existing solar system in terms of size. The moon got its name from the Greek mythological character Rhea who is the revered mother of all the gods.
Saturn's Moon Rhea - Solar System
Rhea [REE-a] is the largest airless satellite of Saturn. 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 somewhat similar to Dione.