janataly ® 10-Feb-2013 17:13

A Short Guide to Celestial Navigation


Year: 2011
Language: english
Author: Henning Umland
Genre: УЧЕБНАЯ ЛИТЕРАТУРА
Publisher: GNU Free
Format: PDF
Quality: OCR without errors
Description: Celestial navigation, also called astronomical navigation, is the art and science of finding one’s geographic position
through astronomical observations, in most cases by measuring altitudes of celestial bodies – sun, moon, planets, or
stars.
An observer watching the night sky without knowing anything about geography and astronomy might spontaneously
get the impression of being on a horizontal plane located at the center of a huge hollow sphere with the celestial bodies
attached to its inner surface. This naive concept of a spherical universe has probably been in existence since the
beginning of mankind. Later, astronomers of the ancient world (Ptolemy et al.) developed it to a high degree of
perfection. Still today, spherical astronomy is fundamental to celestial navigation since the navigator, like the
astronomers of old, measures apparent positions of bodies in the sky without knowing their absolute positions in
space.
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