What does armillary sphere mean?

armillary sphere meaning in General Dictionary

a celestial world consisting of steel hoops; utilized by early astronomers to determine the roles of performers

Sentence Examples with the word armillary sphere

Idrisi, the best known of the Arabian geographical authors, after travelling far and wide in the first half of the 12th century, settled in Sicily, where he wrote a treatise descrip tive of an armillary sphere which he had constructed for Roger II., the Norman king, and in this work he incorporated all accessible results of contemporary travel.

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