bn:01688326n
Noun Concept
Categories: Sundials, Ancient Greek astronomy, Articles with short description, Historical scientific instruments, Astronomical instruments
EN
astronomical rings  annuli astronomici  Astronomer's ring  equinoctial ring  farmer's ring
EN
Astronomical rings, also known as Gemma's rings, are an early astronomical instrument. Wikipedia
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EN
Astronomical rings, also known as Gemma's rings, are an early astronomical instrument. Wikipedia
Early astronomical instrument Wikidata