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Glossary term: 해시계

Description: 하늘에서 태양의 위치는 오랫동안 시간을 재는 기준으로 사용되어 왔습니다. 태양이 지평선 위에서 가장 높이 떠 있는 순간을 현지 정오라고 하며,
‘하루’는 좁은 의미로는 일출부터 일몰까지의 시간, 넓은 의미로는 한 정오에서 다음 정오까지의 시간으로 정의됩니다. 해시계 는 태양의 위치를 이용해 시간을 알려주는 장치입니다. 해시계에는 ‘노우몬(gnomon)’이라고 불리는 막대나 포인터가 있고, 이것이 만든 그림자의 방향과 길이를 통해 시간을 읽을 수 있습니다. 예를 들어 그림자가 ‘12’ 표시를 가리키면, 그때의 시간은 12시입니다. 단순한 해시계는 태양의 실제 위치에 따라 변하는 겉보기 태양 시간만 보여줍니다. 하지만 좀 더 정교한 해시계는 평균 태양 시간을 표시할 수 있도록 설계되어 있습니다.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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