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Loading contentChristiaan Huygens discovered Titan, Saturn's largest moon, with a telescope of his own design.
The first moon of Saturn found, and now known to be the only moon with a thick atmosphere.
Facts on this topic will be cited from these primary and reference sources.
General reference for the history of astronomy, biographies, and cultural context.
Mission data, planetary science, space telescopes, and public-domain imagery.
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