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Scaphe
The Scaphe () was a sundial said to have been invented by Aristarchus (3rd century BC). There are no original works still in existence by Aristarchus, but the image to the right is an accurate image of what it might have looked like, only his would have been made of stone. It consisted of a hemispherical bowl which had a vertical gnomon placed inside it, with the top of the gnomon level with the edge of the bowl. Twelve gradations inscribed perpendicular to the hemisphere indicated the hour of the day. Using this measuring instrument, Eratosthenes of Cyrene (c. 220 BC) measured the length of Earth's meridian arc.
The scaphe is also known as a skaphe, scaphion (diminutive) or (ラテン語:scaphium).
== Inventor ==
Aristarchus
Aristarchus of Samos (; , ''Aristarkhos''; c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it (see Solar system). He was influenced by Philolaus of Croton, but he identified the "central fire" with the Sun, and put the other planets in their correct order of distance around the Sun. His astronomical ideas were often rejected in favor of the geocentric theories of Aristotle and Ptolemy.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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