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出典:Wiktionary
出典:『Wiktionary』 (2025/10/16 12:23 UTC 版)
From helio- + -scope.
helioscope (plural helioscopes)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/18 01:04 UTC 版)
A helioscope is an instrument used in observing the sun. The helioscope was first used by Benedetto Castelli (1578-1643) and refined by Galileo (1564–1642). The method involves projecting an image of the sun onto a white sheet of paper suspended in a darkened room with the use of a telescope. [1]
Helioscope