Astronomers have known that F’s appearance is in large part due to Prometheus, a small “shepherd” moon on its planetward side that comes close to the ring regularly because of orbital vagaries.
Source: wiktionary
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Astronomers have known that F’s appearance is in large part due to Prometheus, a small “shepherd” moon on its planetward side that comes close to the ring regularly because of orbital vagaries.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.