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Sigma KEE - NaturalSatellite

天然卫星

NaturalSatellite is the class of large, naturally occurring astronomical bodies orbiting some other AstronomicalBody.

Relationships
Parents	天文体	The Class of all astronomical objects of significant size. It includes SelfConnectedObjects like planets, stars, and asteroids, as well as Collections like nebulae, galaxies, and constellations. Note that the planet Earth is an AstronomicalBody, but every Region of Earth is a GeographicArea.
	卫星	Satellite is the collection of bodies that revolve around some astronomical body, e.g., planets around a star. This class includes both artificial and NaturalSatellites.
Children	月亮	Moon is the class of NaturalSatellites that orbit planets or large asteroids.
	行星	Planet is the class of large NaturalSatellites that revolve around a star.