Natural satellite

Astronomical body that orbits a planet

A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite). Natural satellites are colloquially referred to as moons, by analogy with the Moon, Earth's natural satellite. In English, the Moon with a capital M denotes Earth's satellite, while moon with a lowercase m is used generically for natural satellites.

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