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Topic: Galactic coordinate system

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	Coordinate_system, Coordinate_system Information, Coordinate_system Wiki
		The coordinates on a space transform naturally (by pullback) under the group of automorphisms of the space, and the set of all coordinates is a commutative ring called the coordinate ring of the space.
		Curvilinear coordinates are a generalization of coordinate systems generally; the system is based on the intersection of curves.
		Circular coordinate system (commonly referred to as the polar coordinate system) represents a point in the plane by an angle and a distance from the origin.
	www.avoo.com /wiki/Coordinate_system (1169 words)

	Galactic coordinate system - Wikipedia, the free encyclopedia
		The galactic coordinates define a spherical coordinate system with the Sun at the center and a plane parallel to the general orientation of the Milky Way galaxy's central plane as the galactic equator.
		Galactic latitudes are measured in degrees and increase from 0° at the Galactic Equator to 90° at the North Galactic Pole near the star Arcturus and decrease to - 90° at the South Galactic Pole in the constellation Sculptor.
		Galactic longitude is measured in degrees as well from 0° to 360° originating in the direction of the axial center of the Milky Way in the constellation Sagittarius.
	en.wikipedia.org /wiki/Galactic_coordinate_system (989 words)

	vik dhillon: phy105 - the celestial sphere - the galactic coordinate system
		vik dhillon: phy105 - the celestial sphere - the galactic coordinate system
		Galactic latitude, b, is analogous to declination, but measures distance north or south of the galactic equator, attaining +90° at the north galactic pole (NGP) and -90° at the south galactic pole (SGP).
		Galactic longitude, l, is analogous to right ascension and is measured along the galactic equator in the same direction as right ascension.
	www.shef.ac.uk /physics/people/vdhillon/teaching/phy105/phy105_galactic.html (303 words)

	Chemistry - Coordinate system
		In mathematics as applied to geometry, physics or engineering, a coordinate system is a system for assigning a tuple of scalars to each point in an n-dimensional space.
		Some choices of coordinate systems may lead to paradoxes, for example, close to a fl hole, but can be understood by changing the choice of coordinate system.
		Changing the basis is a coordinate transformation, a linear transformation that can be summarized by a matrix, and is computationally the same as a mapping of points to other points keeping the bases the same: e.g.
	www.chemistrydaily.com /chemistry/Coordinates (732 words)

	Galactic Coordinates
		The galactic coordinate system is the key to understanding where objects are located within the Galaxy.
		The galactic equator (i.e., 0º galactic latitude) is coincident with the plane of the Milky Way Galaxy and is shown as the red circle in the image above.
		Galactic longitude is measured from 0º to 360º, counter clockwise as seen from the north galactic pole.
	www.thinkastronomy.com /M13/Manual/common/galactic_coords.html (361 words)

	Astronomy Hypertext: Astronomical Coordinate Systems
		Coordinates in the horizon system are known as azimuth and altitude.
		The major disadvantage of the horizon system is that it is peculiar to the observer and not at all a general system.
		In the horizon system, the horizon and vertical circles remain fixed relative to an observer with the celestial sphere moving relative to them, whereas in this system, the celestial meridian and hour circles are on the celestial sphere and thus rotate with it relative to an observer.
	physics.gmu.edu /~jevans/astr103/CourseNotes/earthSky_coordinateSystems.html (1047 words)

	galactic coordinate concept from the Astronomy knowledge base (Site not responding. Last check: )
		Galactic latitude (b) is measured from the galactic equator north (+) or south (-); galactic longitude (l) is measured eastward along the galactic plane from the galactic center.
		In 1958, because of increased precision in determining the location of the galactic center, a new system of galactic coordinates was adopted, with the origin at the galactic center in Sagittarius at α(1950) = 17
		The north Galactic pole is the Galactic pole located above the disk; the south Galactic pole is the Galactic pole located below the disk., The poles of the galactic plane.
	www.site.uottawa.ca:4321 /astronomy/galacticcoordinate.html (307 words)

	Cool Cosmos
		The easiest way to do this is to use coordinate systems which assume that all objects in space are at the same distance, on the inside of an imaginary celestial sphere.
		These three systems are the equatorial, ecliptic and galactic coordinate systems which use the Earth, the ecliptic plane (the path the Earth takes around the Sun), and the center of our galaxy, respectively, as their central locations.
		In the ecliptic system, latitude is measured with respect to the ecliptic plane and position is measured by ecliptic latitude (elat) and ecliptic longitude (elon).
	coolcosmos.ipac.caltech.edu /cosmic_classroom/cosmic_reference/coordsys.html (511 words)

	Observation - Coordinates and Direction
		This system is difficult to use in Astronomy for two reasons: the celestial sphere does not rotate this way, and the coordinates of stars, planets, and galaxies are given based on the equatorial system.
		The axis of rotation for the equatorial system is the North and South Poles.
		This coordinate system is useful when plotting the positions of the other planets as well as asteroids and comets.
	astronomyonline.org /Observation/Coordinates.asp (439 words)

	ccget
		Lngcenter and latcenter are assumed to be in the coordinate system specified by fcsystem, e.g.
		The celestial coordinate system of the input catalog(s).
		The celestial coordinate system of the output coordinates.
	stsdas.stsci.edu /cgi-bin/gethelp.cgi?ccget (2264 words)

	PHY 445/515: Coordinate Systems (Site not responding. Last check: )
		The ecliptic coordinate system is based on the apparent Solar orbit, and is the natural system for Solar System studies.
		The galactic equator is inclined to the celestial equator by 62.6
		Coordinates are measured with respect to the local zenith and the local horizon.
	www.ess.sunysb.edu /fwalter/PHY515/coords.html (428 words)

	Galactic Republic - Wookieepedia, the Star Wars Wiki - A Wikia wiki (Site not responding. Last check: )
		When Queen Amidala—the elected leader of the sovereign system of Naboo—spoke before the Senate, calling for action, she also called for a Vote of No Confidence in the leadership of the Republic, under the persuasion of Palpatine, and Chancellor Finis Valorum was voted out of office.
		The Galactic Republic was composed of a significant portion of the known Galaxy, stretching from the Core Worlds to Wild Space, though it was widely believed that the government held little power in the outlying regions, and preferred to focus its attentions on the Core Worlds.
		The capital of the Galactic Republic was Coruscant, a planet considered to be the cultural and economical center of the Galaxy, despite being located outside of the Deep Core.
	starwars.wikia.com /wiki/Galactic_Republic (4624 words)

	Spherical Coordinate System Lab
		The galactic latitude is measured in degrees perpendicular to the galactic equator.
		The galactic latitude between the galactic equator and the south galactic pole is negative.
		This coordinate system is based upon the physical fact that we live in a flattened disk of stars that the solar system revolves about in approximately 250 million years.
	www.mc.cc.md.us /Departments/planet/planet/Coordinate_Systems_Lab.htm (1626 words)

	Understanding Galactic Coordinates (Site not responding. Last check: )
		When studying objects in the sky it is helpful to use a coordinate system to keep track of where things are.
		The galactic coordinate system has latitude and longitude lines, similar to what you are familiar with on Earth.
		In the galactic coordinate system the zero degree latitude line is the plane of our galaxy, and the zero degree longitude line is in the direction of the center of our galaxy, towards the constellation Sagittarius.The activity below is designed to help you visualize the galactic coordinate grid.
	cse.ssl.berkeley.edu /chips_epo/coordinates.html (522 words)

	SkyView User's Guide (Site not responding. Last check: )
		The Ecliptic and Equatorial coordinate systems are subject to a slow rotation as the position of the vernal equinox, which defines the prime meridian in these systems, changes.
		Near the poles users should be aware that the longitude-like coordinate may be suspect due to the singularity in the coordinate systems.
		The user need only specify the coordinates desired (or alternatively the name of the object to be placed at the center) and the survey or surveys from which an image is to be extracted.
	skyview.gsfc.nasa.gov /help/skyuser.html (6357 words)

	The Milky Way Galaxy
		These globular clusters are strongly concentrated toward the Galactic Center: From their apparent distribution in the sky, Harlow Shapley has concluded that this center of the Milky Way lies at a considerable distance (which he overestimated by factors) in the direction of Sagittarius and not rather close to us, as had been thought previously.
		Our solar system is thus situated within the outer regions of this galaxy, well within the disk and only about 20 light years "above" the equatorial symmetry plane (to the direction of the Galactic North Pole, see below), but about 28,000 light years from the Galactic Center.
		In addition to the overall Galactic Rotation, the solar system is moving between the neighboring stars (peculiar motion) at a velocity of about 20 km/s, to a direction called "Solar Apex," at the approximate position RA=18:01, Dec=+26 (2000.0); this motion has been discovered by William Herschel in 1783.
	www.seds.org /messier/more/mw.html (1383 words)

	The Sagittarius longitudinal coordinate system (Site not responding. Last check: )
		Since tidal debris is closely confined to the Sgr orbital plane, in Paper I we introduce a longitudinal coordinate system as illustrated in Fig.
		This coordinate system is an intuitive system in which to study the tidal tails of the dwarf.
		Since Sgr lies close to the Galactic Center and is on a nearly polar orbit, X_Sgr is roughly -X, Y_Sgr is roughly -Z, and Z_Sgr is roughly +Y, where X,Y,Z is the standard left-handed Galactic Cartestian coordinate system.
	astsun.astro.virginia.edu /~srm4n/Sgr/description.html (266 words)

	[No title]
		Distribution of the active galactic nuclei in Equatorial coordinate system.
		Distribution of the active galactic nuclei in Galactic coordinate system.
		Contour plot of emission redshift against apparent magnitude for the active galactic nuclei.Colour of areas displays amount of objects from red for the largest values, throught yellow and green and on to blue for the smallest values.
	www.ioffe.rssi.ru /astro/QC/notebook.htm (468 words)

	Star Trek Dimension - Star Trek Cartography
		The reason for this peculiarity is that the galactic coordinate system is the sole system which is not based on earth-bounded (and partly distance or time dependant) celestial coordinates, but which uses points of superior systems as definition parameters.
		To calculate both galactic coordinates from the equatorial coordinates, at least the coordinates of two fixed points are needed: the Galactic center and the Galactic north pole.
		The galactic latitude is always correct, however, the galactic longitude deviates with half the values by 0° till 200°.
	www.stdimension.org /int/Cartography/IntroTools.htm (3421 words)

	LAMBDA - Infrared Astronomical Satellite
		Galactic coordinates were chosen as a convenient and natural coordinate system.
		The projection cylinder is tangent to the celestial sphere at the Galactic equator and the projection proceeds by projecting radially outward from each point on the polar axis of the Galactic coordinate system in a plane parallel to the equatorial plane.
		All projections were done so that the sky coordinate associated with a pixel refers to the position at the center of the pixel.
	lambda.gsfc.nasa.gov /product/iras/coordproj.cfm (1010 words)

	Commentary on Star Map in Galactic Perspective
		According to WordIQ.com, the lunar axis is tilted with respect to the normal [of its orbital plane?] by 1.54 degrees, and the coordinates for the lunar northern celestial pole are RA 17 hours 47 min, Dec 65.46 deg.
		Galactic polar plots were prepared which cover the regions from +30 degrees to the North Galactic Pole and from -30 degrees to the Southern Galactic Pole.
		The galactic coordinates used on the map were based on the system used in 1958.
	www.datasync.com /~rsf1/fun/sm-cmts.htm (1294 words)

	Star Clusters (Lab 10) Distribution of Star Clusters in the Milky Way
		Using the equator of the Milky Way (the thin disk that in which we are located) as a reference plane, astronomers have devised a latitude-longitude system called the Galactic Coordinate system.
		In this system the center of the galaxy is at longitude =0, latitude =0.
		The galactic poles are represented by latitude = 90 and - 90.
	www.unm.edu /~astro1/101lab/lab10/lab10_F.html (278 words)

	Starry Night Manual (Galactic Guides)
		Astronomers sometimes use the galactic coordinate system to pinpoint the location of an object in the Milky Way Galaxy.
		Galactic latitude has its baseline of 0 along the plane of the galaxy (the center of the Milky Way) with poles of 90 in Coma Berenices and -90 in Sculptor.
		Galactic longitude's 0 hours is located in the direction of the center of the galaxy (in Sagittarius), increasing in an easterly direction.
	www.starrynight.com /manual/o_galactic.htm (312 words)

	Proposal Planning Toolkit: Colden Help (Site not responding. Last check: )
		Input a set of coordinates in the format of the selected coordinate system or resolve a target name which will set the RA/Dec coordinates in J2000.
		Galactic L2 Longitude in Galactic coordinate system, in decimal degrees (ddd.dddd).
		Latitude in Galactic coordinate system, in decimal degrees (sdd.dddd)
	asc.harvard.edu /toolkit/prop_help_colden.html (728 words)

	No Title
		A coordinate system has been devised that places the position of objects in a galactic reference frame, these coordinates are, not surprisingly, called ``galactic coordinates''.
		In such a diagram, objects in the galactic plane fall on the central line (therefore, any type of object that falls preferentially along that line is located in the disk of the galaxy.
		Plot your star counts vs. angle from the Galactic plane (both on linear scales and with the starcount axis in logarithmic units).
	ngala.as.arizona.edu /dennis/instruct/ay14/galactic.html (889 words)

	Re: Question about Earth's Axis - Astronomy.com Forums
		the ecliptical plane, which is close to the plane of the solar system) is not aligned with the galactic plane and intersects it at an angle of 60.19Â°.
		Therefore, by definition the direction toward the galactic center is at a 90Â° angle to the galactic axis of rotation and the Galactic North Pole.
		The Galactic North Pole was defined in 1959 by the International Astronomical Union as being located at RA 12:49, Dec 27Â°24â in the equatorial coordinate system of B1950.0.
	www.astronomy.com /ASY/CS/forums/312114/ShowPost.aspx (1458 words)

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