This list covers 2 moons with names that start with the letter R, ranging from “Rhea” to “Rosalind.” These natural satellites orbit planets in our solar system and vary widely in size, origin, and surface conditions. They help scientists understand how planets formed and how the solar system evolved over billions of years.

Moons are natural objects that orbit a planet, held in place by gravity. Our solar system has more than 200 known moons, and some of the most fascinating ones orbit the outer planets like Saturn and Uranus. The discovery of these distant moons has often relied on spacecraft flybys, revealing worlds that ground-based telescopes could never see clearly.

Below you’ll find the table with Moon, Parent Planet, Diameter (km), Discovery Year, and Description.

Moon: The name of the moon, so you can identify and look it up quickly by its most widely recognized title.

Parent Planet: The planet this moon orbits, helping you place it within the solar system at a glance.

Diameter (km): The moon’s approximate size in kilometers, giving you a sense of scale from tiny rocks to massive icy worlds.

Discovery Year: The year astronomers first confirmed this moon, showing you how our knowledge of the solar system has grown over time.

Description: A short summary of the moon’s key traits, covering its surface, atmosphere, or discovery story in plain terms.

Moons

MoonParent PlanetDiameter (km)Discovery Year
RheaSaturn1,5271672
RosalindUranus721986

Descriptions

Rhea
Saturn’s second-largest moon and the solar system’s ninth-largest overall. This icy world has a thin oxygen atmosphere and a heavily cratered surface, with hints of a faint ring system of its own.
Rosalind
A small inner moon of Uranus discovered by the Voyager 2 spacecraft during its 1986 flyby. Named after a character in Shakespeare’s comedy “As You Like It,” it orbits close to the planet’s equatorial plane.
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