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The ‘Twilight-setting’ Star Globe

Published online by Cambridge University Press:  18 January 2010

R. d'E. Atkinson
Affiliation:
(Royal Greenwich Observatory)

Abstract

A star globe is described which can be immediately set up for evening or morning twilight by adjusting the latitude and date only; no reference to the Almanac is involved. The azimuth of the below-horizon Sun is also directly evident. The paper discusses the theory involved, and the accuracy attainable both with and without certain simple corrections.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 1961

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