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The Nuttall Encyclopedia
Attendants), name given to the secondary bodies which revolve round the planets of the solar system, of which the Earth has one, Mars two, Jupiter four, Saturn eight, Uranus four, and Neptune is known to have at least one, as Venus is surmised to have.
Wood, James, ed. Entry for 'Satellites'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/s/satellites.html. Frederick Warne & Co Ltd. London. 1900.