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A five-pointed star. A five-pointed star (☆), geometrically an equilateral concave decagon, is a common ideogram in modern culture. Comparatively rare in classical heraldry, it was notably introduced for the flag of the United States in the Flag Act of 1777 and since has become widely used in flags.
The five-pointed star is a symbol of the Baháʼí Faith. [28] [29] In the Baháʼí Faith, the star is known as the Haykal (Arabic: "temple"), and it was initiated and established by the Báb. The Báb and Bahá'u'lláh wrote various works in the form of a pentagram. [30] [31]
The {5/2} star pentagon is also known as a pentalpha or pentangle, and historically has been considered by many magical and religious cults to have occult significance. The {7/2} and {7/3} star polygons ( heptagrams ) also have occult significance, particularly in the Kabbalah and in Wicca .
A 5 ⁄ 16 inch star (9.7mm) is a miniature gold or silver five-pointed star that is authorized by the United States Armed Forces as a ribbon device to denote subsequent awards for specific decorations of the Department of the Navy, Coast Guard, Public Health Service, and National Oceanic and Atmospheric Administration.
In geometry, a pentagon (from Greek πέντε (pente) ' five ' and γωνία (gonia) ' angle ' [1]) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram.
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 ...
Heptagram, a seven-pointed star polygon; Octagram, an eight-pointed star polygon; Enneagram, a nine-pointed star polygon; Decagram, a ten-pointed star polygon; Hendecagram, an eleven-pointed star polygon; Dodecagram, a twelve-pointed star polygon; Magic star, a star polygon in which numbers can be placed at each of the vertices and ...
The horizontal, or altitude-azimuth, system is based on the position of the observer on Earth, which revolves around its own axis once per sidereal day (23 hours, 56 minutes and 4.091 seconds) in relation to the star background. The positioning of a celestial object by the horizontal system varies with time, but is a useful coordinate system ...