Transit Circle Observations
by Us Naval Observatory/science Photo Library
Title
Transit Circle Observations
Artist
Us Naval Observatory/science Photo Library
Medium
Photograph - Photograph
Description
Transit circle observations. US astronomer John Churchill Hammond (1871-1940) using the 6-inch transit circle instrument at the US Naval Observatory, Washington DC, USA. A transit instrument is used to measure the positions of the stars as they transit a pre-defined point. Photographed in 1924.
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October 2nd, 2018
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