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Eidouranion
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Eidouranion : ウィキペディア英語版
Eidouranion

An Eidouranion is a kind of orrery that combined mechanical movement with a method of back projection. Its invention is attributed to Adam Walker who in the 1780s built one measuring 27 feet in diameter. He used it to accompany his lectures on astronomy. It is an ancestor of planetarium projectors.
It is known that Adam Walker held lectures featuring the Eidouranium at the Royal Theatre in London in the 1780s and the London Lyceum.
The word "eidouranion" derives from the Greek compound "eid + ouranos". The combining elements are "eidos", which means "what is seen, shape, form",〔(【引用サイトリンク】url=http://www.cognatarium.com/cognatarium/?K=eid&P=Search+Morphemes )〕 and "ouranos", which was the name of the god of the heavens.〔(【引用サイトリンク】url=http://www.britannica.com/EBchecked/topic/619280/Uranus )〕 Thus, the combined form means "shaped like the heavens" or "formed like the heavens".
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Eidouranion」の詳細全文を読む



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