
	Where results make sense

Topic: Galaxy disk

	Galaxy - Wikipedia, the free encyclopedia
		Most galaxies are several thousand to several hundred thousand light years in diameter and are usually separated from one another by distances on the order of millions of light years.
		Galaxies that emit high-energy radiation in the form of x-rays are classified as Seyfert galaxies, quasars and blazars.
		Clusters of galaxies are often dominated by a single giant elliptical galaxy, which over time tidally destroys its satellite galaxies and adds their mass to its own.
	en.wikipedia.org /wiki/Galaxy (2617 words)

	Disk Galaxy Initial Conditions (Site not responding. Last check: 2007-10-14)
		A dwarf galaxy of one-tenth the mass of the MW (bottom of table) galaxy and a gas fraction of 50%.
		A dwarf galaxy of one-hundredth the mass of the MW (bottom of table) galaxy and a gas fraction of 50%.
		The isolated disk galaxy of Mihos and Hernquist 1994-1996.
	physics.ucsc.edu /~tj/work/diskics (251 words)

	Milky Way Ring
		As smaller galaxies are pulled apart, they dissolve into streams of stars and gas around their host galaxies (see the discussion or "star streams" or "tidal trails" from the Sagittarius Dwarf Elliptical Galaxy).
		The polar ring of NGC 4650A is oriented perpendicular to its spiral disk due to the nature of its collision with another galaxy.
		In general, galactic rings are most often associated with galaxies that have central "bars" of stars (such as the one found in the Milky Way (now classified as a barred spiral galaxy) or other common non-axisymmetric perturbations such as ovals.
	www.solstation.com /x-objects/gal-ring.htm (1258 words)

	Curious About Astronomy? Galaxies
		The young stars in the disk are classified as stellar population I, and the old bulge and halo stars as population II.
		Galaxies with prominent bulges and pronounced spiral arms are classified as "Sb" (M31, M81) or "SBb" (M95, NGC 4725).
		Though the origin of lenticular galaxies is still debated the most plausible explanation to date is that the gas and stars that would reside in the galaxy disk have been stripped by interactions with the hot gas in clusters and groups of galaxies.
	curious.astro.cornell.edu /galaxies.php (1813 words)

	STAR WARS: The Galaxy
		The stellar density of the disk is greatest near the galactic centre (interpenetrating the bulge) and declines with both radial and vertical distance.
		It is ludicruous to suppose that huge arcs of the disk could remain neglected when they have the same average density of desirable resources and emerging or advanced native civilisations as the rest of the disk.
		In the equilibrium condition of the galaxy, the population is distributed according to the availability of habitable planets, and the accessibility and density of surrounding resources.
	www.theforce.net /swtc/galaxy.html (8916 words)

	Spiral (and other Disk) Galaxies
		the disk around the center of M87, which is often regarded as the accretion disk around the supermassive object in that galaxy's nucleus, may be a smaller manifestation of the same disk phenomenon.
		Some of the galaxies, mostly those who had no closer encounters for a longer period of time, and those who have lost most of their interstellar matter for some reason, do not show any conspicuous pattern within their disks; these are often called "S0" or "lenticular" galaxies.
		All disk galaxies have a very different appearance, depending from what direction they are seen, or under which angle toward the line of sight (to us) their disk is inclined.
	www.seds.org /messier/spir.html (727 words)

	Galaxies (Site not responding. Last check: 2007-10-14)
		The luminosity of the galaxy is found from the width of the 21-cm emission line and the distance is then derived using the apparent brightness and the inverse square law.
		Galaxy (a) is 10 Mpc from galaxy (b) and galaxy (c) is 10 Mpc from galaxy (b).
		For elliptical galaxies we use the width of the absorption lines from all of the stars blended together to measure the mass of elliptical galaxies.
	www.star.ucl.ac.uk /~idh/STROBEL/galaxy/galaxyb.htm (2676 words)

	Multiwavelength Messier 94 - Spiral Galaxy (Type Sb)
		Messier 94 is a spiral galaxy with a prominent central bulge and tightly wound spiral arms.
		[The spiral structure of M94 and the presence of dust lanes in the disk is more clearly revealed in a shorter exposure image.] The most interesting feature of the DSS image is the faint and broad ring of light surrounding the galaxy disk (its diameter is nearly as large as the field of view).
		While normal (spiral) galaxies radiate primarily at optical and infrared wavelengths, active galaxies tend to have significant x-ray and synchrotron radio emission.
	coolcosmos.ipac.caltech.edu /cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/m94.html (706 words)

	Angular Momentum in Galactic Dynamics (Site not responding. Last check: 2007-10-14)
		The dynamics of a spiral galaxy is modeled with a mass distribution given by the sum of a spherical bulge and a thin disk.
		The center of the galaxy is at the intersection of the rotation axis and the galactic plane.
		94% of the mass of the galaxy is in the disk.
	www.marmet.ca /louis/galaxy (5351 words)

	Low Surface Brightness Galaxy Gallery (Site not responding. Last check: 2007-10-14)
		LSB disk galaxies have similar structure as high surface brightness galaxies; that is, the light distribution falls of exponentially.
		UGC 6614 This galaxy is a member of the large disk class of LSB galaxies.
		Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a.
	zebu.uoregon.edu /sb2.html (506 words)

	Hide and seek: The nearest galaxy to the Milky Way is found sneaking up behind us \| csmonitor.com (Site not responding. Last check: 2007-10-14)
		As galaxies go, it's one of the larger ones, and, although opinions are sure to vary, it is also one of the loveliest.
		Galaxies come in many different shapes: some are spherical, some are sort of blobby and disorganized, and some are disk-shaped, with elegant spiral arms of young stars radiating out from their centers.
		This galaxy was dubbed the Sagittarius Dwarf galaxy (as it, and the core of the Milky Way, lie in the constellation Sagittarius), and until recently, it held the record for the nearest galaxy, at about 70,000 light away.
	www.csmonitor.com /2003/1202/p25s01-stss.html (1684 words)

	HubbleSite - Hubble Sees Galaxy on Edge - 6/8/2006
		This is a unique view of the disk galaxy NGC 5866 tilted nearly edge-on to our line-of-sight.
		The image highlights the galaxy's structure: a subtle, reddish bulge surrounding a bright nucleus, a blue disk of stars running parallel to the dust lane, and a transparent outer halo.
		It remains in the spiral category because of the flatness of the main disk of stars as opposed to the more spherically rotund (or ellipsoidal) class of galaxies called "ellipticals." Such S0 galaxies, with disks like spirals and large bulges like ellipticals, are called 'lenticular' galaxies.
	hubblesite.org /newscenter/newsdesk/archive/releases/2006/24 (224 words)

	Milky Way Galaxy (Site not responding. Last check: 2007-10-14)
		Galaxies are the objects that contain stars, the gas clouds out of which stars form and all the other stuff in our neighborhood.
		This distribution indicated to Shapley that the center of the galaxy was in the direction of the constellation of Sagittarius.
		The disk is where most of the action occurs in the galaxy, where most of the visible material is, and where the planets, gas clouds, stars and other things hang around.
	www.earth.uni.edu /~morgan/astro/course/Notes/section3/new11.html (8555 words)

	HubbleSite - ACS Image of NGC 5866 - Image - 6/8/2006
		Background galaxies that are millions to billions of light-years farther away than NGC 5866 are also seen through the halo.
		This means that dust and gas still in the galaxy and potentially available to form stars does not stretch nearly as far out in the disk as it did when most of these stars in the disk were formed.
		For spiral galaxies, the incidence of these fingers of dust correlates well with indicators of how many stars have been formed recently, as the input of energy from young massive stars moves gas and dust around to create these structures.
	hubblesite.org /newscenter/newsdesk/archive/releases/2006/24/image/a (738 words)

	Galaxies - Crystalinks
		The Andromeda galaxy also called Andromeda Nevula (catalog numbers NGC 224 and M31), great spiral galaxy in the constellation Andromeda, the nearest external galaxy (except for the Magellanic Clouds, which are companions of the Milky Way Galaxy, in which the Earth is located).
		The young stars in the disk are classified as stellar population I, the old bulge stars as population II.
		However, for some ellipticals, small disk components have been discovered, so that they may be representatives of one end of a common scheme of galaxy forms which includes the disk galaxies.
	www.crystalinks.com /galaxies.html (2450 words)

	Milky Way Galaxy
		The Galaxy M83, shown on the right, is similar in size and shape to the Milky Way Galaxy and appears differently depending upon the wavelength used to view it.
		is a diffuse spherical region that surrounds the Bulge and Disk.
		The Whirlpool Galaxy is one of the most photogenic galaxies which shows the galactic budge and disk.
	www.matter-antimatter.com /milky_way_galaxy.htm (505 words)

	Andromeda Galaxy
		The outer disk emits nearly 10 percent of the galaxy's total light and may be comprised of metal-poor stars stripped from smaller galaxies that strayed too close.
		Satellite galaxy M32 may be interacting to distort the disk structure of Andromeda itself, whose spiral arms of neutral hydrogen are displaced from those consisted of stars by around 4,000 light-years and so cannot be continuously followed in the area closest to its smaller neighbor.
		One hypothesis is that such satellite galaxies are tiny left-overs from the break-up of a more massive galaxy which has since been swallowed by their host but still move within the orbital plane of their predecessor, as galactic mergers are believed to be a main mechanism of galactic growth.
	www.solstation.com /x-objects/andromeda.htm (2237 words)

	SPACE.com -- Andromeda Galaxy 3 Times Bigger than Thought
		The extended stellar disk has gone undetected in the past because the stars that appear in the region of the disk could not be known to be a part of the disk until their motions were calculated.
		The implication is that the disk is 220,000 light years in diameter, instead of the earlier estimates of 70,000 to 80,000 light years.
		The central region of a spiral galaxy is believed to have formed first, with the rotating disk coming later.
	www.space.com /scienceastronomy/050530_andromeda_size.html (787 words)

	Case, WIYN astronomers discover new galaxy orbiting Andromeda
		The new galaxy is so widespread and transparent that astronomers did not suspect its existence until they mapped the velocity of stars thought to belong to the well-known and nearby large Andromeda spiral galaxy and found them to move independently of Andromeda.
		She adds that the reason Andromeda VIII escaped detection was the fact that it is located in front of the bright regions of Andromeda's galaxy disk.
		Morrison and her collaborators also suggested that a very faint stream of stars, detected near the large Andromeda galaxy in 2001 by the Italian Astronmer R. Ibata and colleagues, was pulled off Andromeda VIII in an earlier passage around the parent galaxy.
	www.case.edu /pubaff/univcomm/2003/9-03/galaxy.htm (821 words)

	Warp factor: a spinning dwarf may have twisted our galaxy's disk - Out There Natural History - Find Articles
		Thin and fiat, the disk is 100,000 light-years across, about 1,000 light-years thick, on average, and includes more than 80 percent of the galaxy's hundred billion or so stars.
		Picture that sun-baked record spinning on a turntable or a disk of pizza dough spun into the air by a skilled chef: our galaxy goes through the same kind of floppy, wobbly gyrations, though at a rate best measured in revolutions per hundreds of millions of years.
		Gravitational collisions between small satellite galaxies and big spiral galaxies have long been regarded as possible culprits in the warping of a larger galaxy's disk.
	www.findarticles.com /p/articles/mi_m1134/is_3_112/ai_99818082 (996 words)

	APOD: December 20, 1998 - Edge On Spiral Galaxy NGC 891 (Site not responding. Last check: 2007-10-14)
		Spirals have most of their bright stars, gas, and obscuring dust in a thin disk.
		spiral galaxy appears edge-on like a compact disk seen sideways.
		The dark band across the middle is a lane of dust which absorbs light.
	antwrp.gsfc.nasa.gov /apod/ap981220.html (156 words)

	Spaceflight Now \| Breaking News \| A pancake shapes distant galactic center
		Greenhill and his fellow astronomers identified the disk using the Australia Telescope Long Baseline Array, which is a network of radio telescopes 600 miles across.
		The Circinus disk in particular is so deeply buried in a jumble of stars, gas, and dust that no optical telescope can detect it.
		Greenhill and his colleagues plan to continue studying the nucleus of the Circinus galaxy to investigate the mechanism responsible for generating the outflow.
	spaceflightnow.com /news/n0307/22galacticcenter (1133 words)

	ChView - THE STARS OF THE MILKY WAY
		In astrometic binaries, the presence of an invisible companion is inferred from slight "wobblings" in the motion of the primary.
		Since the estimated age of our galaxy is about 13 billion years or less, none of the lower mass stars (M to G8) have had time to fade from view, but most of the previously born, higher mass stars (B to O) have already perished.
		Thick disk stars may comprise as much as four percent of nearby stars, including Lalande 2115 (M2.1V) which is moving perpendicular to the galactic plane at a fast velocity of 47 km/sec.
	members.nova.org /~sol/chview/chv5.htm (2527 words)

	Stellar Populations of the Milky Way Galaxy
		Closeup view of the Galaxy's disk and halo structure perpendicular to the Galactic plane near the solar neighborhood (from ref. [4]).
		The goal of this project is to determine the large-scale spatial distribution of the stars and their metallicities in the Galactic thick disk component.
		While both these results tend to support an accretion model of formation of the thick disk, a definitive proof of the absence of a metallicity gradient is however still lacking [4].
	www.astro.unibas.ch /forschung/rb/structure.shtml (441 words)

	Galaxy Transformations
		One disk lies in the orbit plane, and spins in the same direction that the galaxies circle each other.
		The larger disk is only partly disrupted by the collision; it survives as a plausible S0 galaxy.
		The small disk is inclined by 71 degrees, the large disk by 109 degrees.
	www.ifa.hawaii.edu /faculty/barnes/transform.html (941 words)

	Disc galaxy - Wikipedia, the free encyclopedia
		Disc galaxies are galaxies which have discs, a flattened circular volume of stars.
		These galaxies may, or may not include a central non-disc-like region (central bulge).
		lenticular galaxies (type E8, S0, SA0, SB0, SAB0)
	en.wikipedia.org /wiki/Disc_galaxy (66 words)

	Thin Disk Galaxy
		NGC 4945 is a spiral galaxy in the Centaurus Group of galaxies, located only six times farther away than the prominent Andromeda Galaxy.
		The thin disk galaxy is oriented nearly edge-on, however, and shrouded in dark dust.
		Most of the spots scattered about the frame are foreground stars in our own Galaxy, but some spots are globular clusters orbiting the distant galaxy.
	www.skyimagelab.com /thindiskgalaxy.html (195 words)

	Lenticular (S0) Galaxies (Site not responding. Last check: 2007-10-14)
		The icon shows the M102 candidate NGC 5866, the Spindle Galaxy.
		The lenticular galaxies are disk galaxies without any conspicuous structure in their disks.
		From their appearance, and also their stellar contents (e.g., spectral type), they look more like ellipticals rather than spirals, and have often been misclassified due to this fact.
	www.seds.org /messier/lenticul.html (105 words)

	The Galaxy, Our Home in Space
		material forms disk as it is transferred to a compact star
		Slide # 28 : The Galaxy is a Disk?
		we are in the center of the Galaxy
	astro.gmu.edu /classes/a113/l18/L18_02.HTM (841 words)

Try your search on: Qwika (all wikis)