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The number used to identify stars in navigation publications and star charts. [Note 2] Common name The name of the star commonly used navigation publications and star charts. Bayer designation: Another name of the star which combines a Greek letter with the possessive form of its constellation's Latin name. Etymology of common name
A diagram of a typical nautical sextant, a tool used in celestial navigation to measure the angle between two objects viewed by means of its optical sight. Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator to accurately determine their actual current physical position in space or on the ...
A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1] They have been used for human navigation since time immemorial. [2]
The positions of 57 selected stars are specified relative to the First Point of Aries. In Great Britain, The Nautical Almanac has been published annually by HM Nautical Almanac Office, ever since the first edition was published in 1767. [1] [2] In the United States, a nautical almanac has been published annually by the US Naval Observatory ...
With an apparent magnitude that fluctuates around 1.98, [3] it is the brightest star in the constellation and is readily visible to the naked eye at night. [16] The position of the star lies less than 1° away from the north celestial pole, making it the current northern pole star.
The following lists of constellations are available: IAU designated constellations – a list of the current, or "modern", constellations; Former constellations – a list of former constellations; Chinese constellations – traditional Chinese astronomy constellations; List of Nakshatras – sectors along the Moon's ecliptic
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His book, The Book of Fixed Stars, designed for accuracy for the year 964, was a "description of the constellations that combines Greek/ Ptolemaic traditions with Arabic/Bedouin ones". [10] The Book of Fixed Stars then served as an important source of star coordinates for makers of astrolabes and globes across the Islamic world. [11]
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