- Galactic quadrant
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- Galactic quadrant - Wikipedia
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- Galactic quadrant - Simple English Wikipedia, the free encyclopedia
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- Star Trek's 4 Quadrants & Galaxy Explained - Screen Rant
- A New Map of the Milky Way - Scientific American
- Galactic quadrant (Star Trek) - EverybodyWiki Bios & Wiki
- Galactic coordinate system - Wikipedia
- Galactic quadrant - Wikiwand
- Galactic quadrant (Star Trek) | Neo Encyclopedia Wiki | Fandom
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A galactic quadrant, or quadrant of the Galaxy, is one of four circular sectors in the division of the Milky Way Galaxy.
Quadrants in the galactic coordinate system
In actual astronomical practice, the delineation of the galactic quadrants is based upon the galactic coordinate system, which places the Sun as the pole of the mapping system. The Sun is used instead of the Galactic Center for practical reasons since all astronomical observations (by humans) to date have been based on Earth or within the Solar System.
= Delineation
=Quadrants are described using ordinals—for example, "1st galactic quadrant", "second galactic quadrant", or "third quadrant of the Galaxy". Viewing from the north galactic pole with 0 degrees (°) as the ray that runs starting from the Sun and through the galactic center, the quadrants are as follows (where l is galactic longitude):
1st galactic quadrant – 0° ≤ l ≤ 90°
2nd galactic quadrant – 90° ≤ l ≤ 180°
3rd galactic quadrant – 180° ≤ l ≤ 270°
4th galactic quadrant – 270° ≤ l ≤ 360°
Constellations grouped by galactic quadrants
= Visibility of each quadrant
=Due to the orientation of the Earth to the rest of the galaxy, the 2nd galactic quadrant is primarily only visible from the northern hemisphere while the 4th galactic quadrant is mostly only visible from the southern hemisphere. Thus, it is usually more practical for amateur stargazers to use the celestial quadrants. Nonetheless, cooperating or international astronomical organizations are not so bound by the Earth's horizon.
Based on a view from Earth, one may look towards major constellations for a rough sense of where the borders of the quadrants are: (Note: by drawing a line through the following, one can also approximate the galactic equator.)
For 0°, look towards the Sagittarius constellation. (The galactic center)
For 90°, look towards the Cygnus constellation.
For 180°, look towards the Auriga constellation. (The galactic anticenter)
For 270°, look towards the Vela constellation.
Traditional fourfold divisions of the skies
A long tradition of dividing the visible skies into four precedes the modern definitions of four galactic quadrants. Ancient Mesopotamian formulae spoke of "the four corners of the universe" and of "the heaven's four corners",
and the Biblical Book of Jeremiah echoes this phraseology: "And upon Elam will I bring the four winds from the four quarters of heaven" (Jeremiah, 49:36). Astrology too uses quadrant systems to divide up its stars of interest. The astronomy of the location of constellations sees each of the Northern and Southern celestial hemispheres divided into four quadrants.
In fiction
= Star Trek
="Galactic quadrants" within Star Trek are based around a meridian that runs from the center of the Galaxy through Earth's Solar System, which is not unlike the system used by astronomers. However, rather than have the perpendicular axis run through the Sun, as is done in astronomy, the Star Trek version runs the axis through the galactic center. In that sense, the Star Trek quadrant system is less geocentric as a cartographical system than the standard. Also, rather than use ordinals, Star Trek designates them by the Greek letters Alpha, Beta, Gamma, and Delta.
The Canadian Galactic Plane Survey (CGPS) created a radio map of the Galaxy based on Star Trek's quadrants, joking that "the CGPS is primarily concerned with Cardassians, while the SGPS (Southern Galactic Plane Survey) focuses on Romulans".
= Star Wars
="Galactic quadrants" within Star Wars canon astrography map depicts a top-down view of the galactic disk, with "Quadrant A" (i.e. "north") as the side of the galactic center that Coruscant is located on. As the capital planet of the Republic and later the Empire, Coruscant is used as the reference point for galactic astronomy, set at XYZ coordinates 0-0-0. Standardized galactic time measurements are also based on Coruscant's local solar day and year.
= Warhammer 40,000
=The Imperium of Man's territory in the Milky Way Galaxy in Warhammer 40,000 is divided into five zones, known as "segmentae". Navigation in the Milky Way is also identified with cardinal directions, indicating distance from the Sol System: for example, Ultima Segmentum, the largest segmentum in the Imperium of Man, is located to the galactic east of the Sol System. The 0° "north" in Imperial maps does not correspond to the 0° in the real-world.
See also
Astronomical coordinate systems
Galactic coordinate system
References
External links
Milky Way Explorer
Kata Kunci Pencarian:
Galactic quadrant - Simple English Wikipedia, the free encyclopedia
Galactic quadrant - Wikipedia
Galactic Quadrant - Tradebit
Galactic Quadrant Map by syppy1 on DeviantArt
Galactic quadrant | Wikiwand | Constellations, Galactic, Milky way galaxy
Galactic Quadrant Star Trek-ru Stock Photo - Alamy
A view of Galactic quadrant I, with the gas flow direction (arrows ...
A view of Galactic quadrant I, with the gas flow direction (arrows ...
A view of Galactic quadrant I, with the gas flow direction (arrows ...
Galactic Quadrant (GQ) - Preço de Galactic Quadrant em tempo real ...
Quadrantids Archives - Universe Today
Galactic Atlas/Mapping Our Galaxy - 118Wiki
galactic quadrant
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Galactic quadrant - Wikipedia
A galactic quadrant, or quadrant of the Galaxy, is one of four circular sectors in the division of the Milky Way Galaxy. Numbered quadrants and sectors of constellations. Quadrants as starcharts, with most prominent stars marked.
Quadrant | Memory Alpha | Fandom
In stellar cartography, a quadrant is a major region of space encompassing a portion of a galaxy. The Milky Way Galaxy was commonly divided into four equally sized, cubic quadrants, defined by one meridian passing through the galactic core and …
Galactic quadrant - Simple English Wikipedia, the free encyclopedia
A galactic quadrant is one of four sectors of the Milky Way galaxy. A galactic quadrant is also a fictional area in the television show Star Trek. In the television show the Milky Way Galaxy is split into four sections. These sections are the Alpha Quadrant, Beta Quadrant, Gamma Quadrant, and Delta Quadrant.
Milky Way - Wikipedia
A galactic quadrant, or quadrant of the Milky Way, refers to one of four circular sectors in the division of the Milky Way. In astronomical practice, the delineation of the galactic quadrants is based upon the galactic coordinate system , which places the …
Star Trek's 4 Quadrants & Galaxy Explained - Screen Rant
Dec 28, 2022 · Along with the Milky Way Galaxy's quadrants, the Star Trek universe encompasses galactic barriers, further galaxies, and even a mythological core.
A New Map of the Milky Way - Scientific American
Apr 1, 2020 · Using such measurements, galactic cartographers employ a convenient coordinate system for our Milky Way as viewed from the sun: by analogy to Earth’s longitude and latitude, galactic longitude...
Galactic quadrant (Star Trek) - EverybodyWiki Bios & Wiki
Jul 25, 2020 · In the television series Star Trek and its spin-offs, a galactic quadrant is an area of the Milky Way Galaxy. In the original Star Trek, it referred to an area interchangeable with a sector.
Galactic coordinate system - Wikipedia
The galactic coordinates use the Sun as the origin. Galactic longitude (l) is measured with primary direction from the Sun to the center of the galaxy in the galactic plane, while the galactic latitude (b) measures the angle of the object above the galactic plane.
Galactic quadrant - Wikiwand
A galactic quadrant, or quadrant of the Galaxy, is one of four circular sectors in the division of the Milky Way Galaxy.
Galactic quadrant (Star Trek) | Neo Encyclopedia Wiki | Fandom
In the television series Star Trek and its spin-offs, Galactic quadrant refers to an area of the Milky Way Galaxy. In the original Star Trek, it referred to an area interchangeable with a sector.