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.

单词	Eidouranion
释义	Eidouranion 英语百科 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.
随便看	testimonializes的意思 testimonializing的意思 testimonial letter的意思 Testimonial match的意思 testimonial privilege的意思 testimonial proof的意思 testimonial的意思 testimonie的意思 testimony的意思 testimonio的意思 testimonios的意思 Testimonium的意思 testimonium clause的意思 testimoniums的意思 testimony的意思 testimony experiment的意思 Testimony,Expert的意思 testimony mark的意思 testimony meeting的意思 testimony of accomplice的意思 testimony of a witness的意思 testimony of eyewitness的意思 testimony of the accused的意思 testimony of witness的意思 testimony of witness with knowledge的意思