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The ‘Twilight-setting’ Star Globe

Published online by Cambridge University Press:  18 January 2010

R. d'E. Atkinson
R. d'E. Atkinson
Affiliation:
(Royal Greenwich Observatory)
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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
Information
The Journal of Navigation , Volume 14 , Issue 2 , April 1961 , pp. 210 - 214
Copyright
Copyright © The Royal Institute of Navigation 1961

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