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List of nearest stars (up to 20 light-years) List of star systems within 20–25 light-years; ... List of selected stars for navigation; List of star extremes;
The front cover of a List of Lights volume. A list of lights is a publication describing lighthouses and other aids to maritime navigation. Most such lists are published by national hydrographic offices. Some nations, including the United Kingdom and the United States, publish lists that cover the whole world in many volumes. Other nations ...
Bar — Barkhatova (open star clusters) (for example: Barkhatova 1, NNW of NGC 7000; the North America Nebula in Cygnus) BAR — E.E. Barton (double stars) Bas — Basel (open star clusters) (for example: Basel 1 at about one degree WNW of open star cluster Messier 11 in Scutum) (Basel 1 is also known as the Apriamashvili cluster)
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 ...
Watercraft navigation lights must permit other vessels to determine the type and relative angle of a vessel, and thus decide if there is a danger of collision. In general, sailing vessels are required to carry a green light that shines from dead ahead to 2 points (22 + 1 ⁄ 2 °) abaft [note 1] the beam on the starboard side (the right side from the perspective of someone on board facing ...
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 ...
While light characteristics can be described in prose, e.g. "Flashing white every three seconds", lists of lights and navigation chart annotations use abbreviations. The abbreviation notation is slightly different from one light list to another, with dots added or removed, but it usually follows a pattern similar to the following (see the chart ...
Written records of navigation using stars, or celestial navigation, go back to Homer's Odyssey where Calypso tells Odysseus to keep the Bear (Ursa Major) on his left hand side and at the same time to observe the position of the Pleiades, the late-setting Boötes and the Orion as he sailed eastward from her island Ogygia traversing the Ocean. [5]
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