Natural satellite
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A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body. Natural satellites are colloquially referred to as moons, by anal
Size comparison of Earth and the Moon
Artist impression of Rhea's proposed rings
Jupiter family
243 ida crop
Regular moon
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In astronomy, a regular moon or a regular satellite is a natural satellite following a relatively close, stable, and circular orbit which is generally aligned to its primary's equator. They form withi
Active plumes on the south pole of Saturn's moon Enceladus, fed by a global subsurface ocean of liquid water